Quiz on Motion and Forces

Convert 36 km/h to m/s.

• 10 m/s

• 36 m/s

• 18 m/s

• 5 m/s

Convert 0.25 hours into seconds.

• 15 s

• 60 s

• 900 s

• 150 s

A runner travels 800 metres in 160 seconds. What is their average speed in m/s?

• 0.2 m/s

• 5 m/s

• 8 m/s

• 2 m/s

A car travels at 20 m/s for 45 seconds. How far does it travel?

• 900 m

• 65 m

• 225 m

• 450 m

A distance–time graph shows a straight line rising steadily from 0 to 60 m in 30 seconds. What is the speed? What does the straight line indicate about the type of motion?

• 2 m/s, constant speed

• 0.5 m/s, accelerating

• 30 m/s, decelerating

• 2 m/s, changing speed

A scooter increases its speed from 2 m/s to 6 m/s in 2 seconds. What is its acceleration?

• 2 m/s²

• 4 m/s²

• 3 m/s²

• 1 m/s²

A train slows from 25 m/s to 5 m/s in 10 seconds. Calculate the acceleration. Is this acceleration or deceleration?

• 2 m/s², acceleration

• -2 m/s², deceleration

• 0.5 m/s², acceleration

• -0.5 m/s², deceleration

A 2 kg trolley accelerates at 3 m/s². What net force is acting on it?

• 1.5 N

• 6 N

• 5 N

• 0.67 N

A larger trolley takes longer to reach the same speed under the same force. Use Newton’s Second Law to explain why.

• Larger mass means greater acceleration for the same force.

• Larger mass means less acceleration for the same force.

• Larger mass does not affect acceleration.

• Larger mass means the force increases.

In a class experiment, students found that doubling the mass of a trolley halved the acceleration when the force remained constant. Explain this result using Newton’s Second Law.

• Acceleration is directly proportional to mass.

• Acceleration is inversely proportional to mass.

• Acceleration does not depend on mass.

• Acceleration is proportional to the square of mass.