3A2 Chap 3 Revision

When forces acting on an object are balanced, the possible states of motion are: (you may choose more than one option)

• Object remains at rest.

• Object accelerates.

• Object decelerates.

• Object moves with constant speed

When forces acting on an object are unbalanced, the possible states of motion are: (you may choose more than one option)

• Object remains at rest.

• Object accelerates.

• Object decelerates.

• Object moves with constant speed

A force of 5 N is exerted on an object of 10 kg. Calculate the acceleration of the object.

• 50 m/s^2

• 2 m/s^2

• 0.5 m/s^2

• 0.0005 m/s^2

A ball is rolling down a slope at a constant speed. Which of the following statements is correct?

• There is an unbalanced force downwards.

• The forces acting on the ball are balanced.

• There are no forces acting on the ball.

• Frictional force is greater than the forward force.

A force of 10 N is exerted on a 16 kg box. A frictional force of 2 N is exerted on the box as shown. Calculate the acceleration of the box.

• 160 m/s^2

• 1.6 m/s^2

• 0.5 m/s^2

• 0.625 m/s^2