Forces & Motion Revision Recall Quiz 2

True or False? "Applying a force can cause an object's speed to change, but not its direction of motion."

• True

• False

To travel at a constant speed, the driving force of a car engine must...

• be less than the frictional forces.

• balance the frictional forces.

• exceed the frictional forces.

True or False? "An object that has been elastically deformed returns to its original shape and length after the deforming force is removed."

• True

• False

Which of the following equations correctly shows the relationship between the momentum, p, mass, m, and velocity, v, of a body?

How much force would be needed to accelerate a 6 kg object by 3 m/s² ?

• 0.5 N

• 2 N

• 18 N

The gradient of an object's velocity-time graph gives ...

• the distance travelled by the object.

• the maximum velocity of the object.

• the acceleration of the object.

Which of these does not affect the braking distance of a car?

• The car's speed

• The condition of the car's tyres

• The driver's reaction time

A ball hits a wall with a force of 5 N. What is the force exerted on the ball by the wall?

• 0 N

• -5 N

• -10 N

A force is applied to a trolley and causes an acceleration of 2.4 m/s². The same force is applied to a second trolley with half the mass of the first. What will the acceleration of the second trolley be?

• 1.2 m/s² 

• 2.4 m/s²  

• 4.8 m/s²  

Which of the following forces only acts between bodies that are in contact with one another?

• Gravitational force

• Friction

• Electrostatic force