7th Class General Science Unit 8 Force and Motion MCQs (قوت اور حرکت) | PAKMCQs

Usain Bolt is correct because he holds the official World Record in the Men's 100-meter race.

9.58 seconds is correct because Usain Bolt set the world record by finishing the 100-meter sprint in exactly 9.58 seconds.

10.4 m/s is correct because his average speed during the record sprint was 10.4 meters per second.

37.5 km/h is correct because converting his speed to kilometers per hour equals 37.5 km/h.

Act of movement is correct because in physics, motion is simply the change in position or act of movement of an object.

Because you are not changing position relative to class surroundings is correct because state of rest is defined by no change in position relative to a reference frame.

Because the Earth itself is in motion is correct because the Earth is constantly revolving and rotating through space.

The observer (frame of reference) is correct because motion and rest are relative to the observer's frame of reference.

Distance is correct because the total length of the actual physical path traveled is defined as distance.

Both A and B is correct because distance can be covered along a straight path or along curved lines.

Speed is correct because speed is the rate that quantifies how fast distance is covered per unit of time.

Force is correct because applying an external force is required to alter velocity or state of rest/motion.

112 km/h is correct because a cheetah can sprint at a top speed of approximately 112 km/h.

500 km/h is correct because modern high-speed Japanese bullet trains can achieve operating speeds up to 500 km/h.

3.1 km/h is correct because the Saharan Silver Ant reaches top running speeds of 3.1 km/h.

40,000 km/h is correct because escaping Earth's gravitational pull requires space rockets to hit speeds around 40,000 km/h.

0.00758 mph is correct because garden snails crawl extremely slowly at approximately 0.00758 mph.

20 mph is correct because an elephant can charge and run at speeds of about 20 mph.

25.35 mph is correct because a domestic cat can sprint at speeds reaching 25.35 miles per hour.

29 mph is correct because Usain Bolt reached a peak sprinting speed of 29 mph during his world record race.

40 mph is correct because Greyhound racing dogs can achieve speeds of 40 miles per hour.

43.30 mph is correct because thoroughbred racehorses average speeds around 43.30 miles per hour.

50.60 mph is correct because an Impala antelope can sprint at speeds up to 50.60 miles per hour.

70 mph is correct because in imperial units, a cheetah's top sprint reaches 70 miles per hour (approx. 112 km/h).

Speed is correct because speed is defined in physics as the rate describing how fast an object travels.

Because the car has greater speed is correct because an object with higher speed covers more distance in equal time.

Cover a greater distance is correct because speed is directly proportional to distance covered over a given time.

40,000 km is correct because a speed of 40,000 km/h means 40,000 kilometers are traveled per hour.

Both A and B is correct because calculating speed requires knowing the distance traveled and the time taken.

Speed is correct because speed is defined scientifically as distance divided by unit time.

Speed = Distance / Time is correct because speed equals the ratio of distance traveled to the time elapsed.

v=Speed, S=Distance, T=Time is correct because 'v' represents speed, 'S' denotes distance covered, and 'T' stands for time.

Meter per second (m/s) is correct because the SI base unit for distance is meter and time is second, giving m/s.

Both A and B is correct because kilometers per hour (km/h) and miles per hour (mi/h) are widely used larger units for vehicular speeds.

Average speed is correct because variable speeds over a journey are represented by calculating average speed.

Average Speed = Total Distance / Total Time is correct because average speed is defined as total distance divided by total elapsed time.

International System of Units is correct because SI stands for the globally adopted Système International / International System of Units.

Meter is correct according to the provided text which notes meter usage in historical comparisons for America.

Foot is correct because England traditionally used imperial measurement units like the foot.

Guz is correct because the traditional regional unit for measuring length in the subcontinent was the guz.

Same quantity had different units in different parts of the world is correct because lack of uniformity created confusion in trade and science.

Because using different units made trade and science difficult is correct because international standardization was needed to facilitate scientific data sharing and trade.

Paris in 1960 is correct because the 11th General Conference on Weights and Measures adopted SI units in Paris in 1960.

300 km is correct because adding both stages yields 180 km + 120 km = 300 km.

3 hours is correct according to the provided sample journey statement where the journey took 3 hours.

100 km/h is correct because Average Speed = 300 km / 3 h = 100 km/h.

1000 m is correct because by metric definition 1 kilometer = 1000 meters.

3600 s is correct because 1 hour = 60 minutes x 60 seconds = 3600 seconds.

5/18 is correct because 1000 m / 3600 s simplifies to multiplying by the fraction 5/18.

18/5 is correct because converting m/s to km/h requires multiplying by the reciprocal fraction 18/5.

Speedometer is correct because the speedometer indicates instantaneous speed in real time.

Because instantaneous speed varies during driving is correct because acceleration, braking, and traffic cause speed to fluctuate constantly.

Odometer is correct because the odometer records the cumulative total distance traveled by a vehicle.

Rotation speed (RPM) is correct because a tachometer measures the rotational speed of an engine in revolutions per minute (RPM).

30 km is correct because total distance is simply the scalar sum of all paths traveled: 20 km + 10 km = 30 km.

1.5 hours is correct because converting 30 minutes to 0.5 hours gives 1 h + 0.5 h = 1.5 hours.

20 km/h is correct because Average Speed = 30 km / 1.5 h = 20 km/h.

Graph is correct because a graph visually plots the relationship between independent and dependent quantities.

Origin is correct because the coordinate reference intersection point (0,0) is called the origin.

Both A and B is correct because the horizontal axis is designated as the x-axis and the vertical axis as the y-axis.

Both A and B is correct because by scientific convention distance is on the y-axis and time is on the x-axis.

Zero is correct because an object at rest covers 0 distance over time, meaning its speed is exactly zero.

10 meters is correct because the uniform data shows distance increasing by 10 meters every second.

Uniform or constant speed is correct because covering equal distance per equal time unit defines uniform (constant) speed.

It is neither speeding up nor slowing down is correct because constant speed implies zero acceleration/deceleration.

A straight sloped line is correct because linear rate of distance increase against time yields a straight sloped line.

Force is correct because pushing an object to cause movement is an application of mechanical force.

Force is correct because pulling involves applying tensile force on the string.

Both A and B is correct because force is applied both to accelerate the ball by kicking and to decelerate it by catching.

Force is correct because pressing the accelerator causes the engine to exert a forward driving force.

By applying a retarding force against motion is correct because brakes generate frictional retarding force opposing wheel motion.

An agent that pulls or pushes an object is correct because fundamental force is defined as a push or pull acting on a body.

Both A and B is correct because force can start motion in a stationary object and stop a moving object.

Both A and B is correct because force can either accelerate (speed up) or decelerate (slow down) an object depending on direction.

Its direction of motion is correct because a force applied at an angle changes the direction of a moving body.

Both A and B is correct because deforming forces can change both the shape and size (dimensions) of an object.

Sir Isaac Newton is correct because the SI unit of force is named the newton in honour of Sir Isaac Newton.

Newton is correct because the standard International System (SI) unit of force is the newton.

N is correct because the SI unit newton is represented symbolically by the capital letter N.

1 Newton (1N) is correct because by scientific definition: 1 N = 1 kg × 1 m/s².

Due to gravity is correct because Earth's downward gravitational attractive force pulls the ball to the ground.

Changes its direction almost perpendicularly is correct because applying a horizontal impact force to a vertically falling ball changes its direction of motion at a right angle.

Contact force is correct because forces requiring direct mechanical touching between objects are contact forces.

Contact force is correct because kicking requires physical contact between the foot and the ball.

Contact force is correct because air resistance relies on direct physical collisions between air particles and the parachute canopy.

Both A and B is correct because friction, air drag, muscular forces, and surface tension all require physical contact.

Non-contact force is correct because field forces that act through a distance without physical touching are non-contact forces.

Both A and B is correct because gravity, magnetic force, and electrostatic forces all act across a distance without contact.

Both A and B is correct because friction, normal, applied, drag, and spring forces all require direct surface contact to operate.

All of the above is correct because gravitational, electric, and magnetic fields exert forces without physical contact.

Newton's Law of Motion is correct because Newton's Third Law of Motion defines the principle of equal and opposite action-reaction pairs.

Two forces is correct because action and reaction are always a pair of simultaneous interactive forces.

An equal but opposite reaction force is correct because mutual interaction always produces an equal and opposite reaction force.

Because they act on two different bodies is correct because forces can only cancel if they act simultaneously on the same single object.

Action force is correct because the impact force of the ball hitting the wall is the initial action force.

Due to the reaction force exerted by the wall on the ball is correct because the wall exerts an equal and opposite reaction force pushing the ball back.

Action is on the wall, reaction is on the ball is correct because the ball exerts action on the wall, while the wall exerts reaction on the ball.

On two different bodies is correct because action and reaction force pairs invariably act on two distinct interacting bodies.

Action force is correct because pushing backward against the ground is the applied action force.

The ground pushing us forward is correct because the ground exerts an equal forward reaction force against our foot.

Both A and B is correct because setting up the experiment involves inflating a balloon, attaching a straw, and threading string through it.

Air releasing rapidly from the balloon is correct because the backward rush of escaping air forms the action force.

It moves ahead (forward) is correct because the forward reaction force propels the balloon ahead along the string.

Hot gases moving out backward is correct because the high-speed downward/backward expulsion of exhaust gases creates the action force.

Due to reaction force from expelled hot gases is correct because an equal and opposite thrust/reaction force drives the rocket upward.

In pairs is correct because forces in nature always occur as simultaneous, equal, and opposite action-reaction pairs.

Speed is correct because speed measures rate of motion and how rapidly distance is traversed.

Speed is correct because the formal scientific definition of speed is distance covered in unit time.

Graph is correct because a graph illustrates visual data comparisons between variables.

Both A and B is correct because distance is plotted on the vertical y-axis and time on the horizontal x-axis.

Force is correct because a push or a pull exerted on an object is defined as a force.

Newton is correct because the SI derived unit of force is the newton (N).

Contact force is correct because a force requiring direct physical touch between surfaces is a contact force.

Non-contact force is correct because forces acting across empty space or distance without physical touch are non-contact forces.

Equal but opposite reaction is correct because Newton's third law guarantees an equal and opposite reaction force.

Newton is correct because the SI derived unit measuring mechanical force is the newton (N).

Speed is correct because Speed = Distance / Time.

300 m is correct because Distance = Speed × Time = 30 m/s × 10 s = 300 m.

Cheetah is correct because the cheetah is the fastest land animal, sprinting up to 112 km/h.

Opposite is correct because Newton's third law specifies action and reaction forces are equal in magnitude and opposite in direction.

m/s is correct because the SI standard metric unit for speed is meter per second (m/s).

Uniform is correct because covering identical distance increments across identical time windows defines uniform speed.

At rest is correct because zero change in distance over time means the object is stationary, i.e., at rest.

Action and reaction forces is correct because pushing water backward (action) generates an equal forward thrust on the swimmer (reaction), demonstrating Newton's third law action-reaction forces.

Gravity is correct because gravitational pull operates across space without requiring physical contact.