Forces Dynamics Quiz 1

• 5 N

• 10 N

• 17 N

• 20 N

Which of the following could be measured in the same units as force?

• energy / distance

• energy x distance

• energy / time

• momentum x distance

Which is not one of Newton's laws of motion?

• The total momentum of a system of interacting bodies remains constant, providing no

  external force acts.

• The rate of change of momentum of a body is directly proportional to the external force

  acting on the body and takes place in the direction of the force.

• If body A exerts a force on body B, then body B exerts an equal and oppositely-directed force

  on body A.

• A body continues in a state of rest or of uniform motion in a straight line unless acted upon

  by some external force.

A cyclist is riding at a steady speed on a level road.

According to Newton’s third law of motion, what is equal and opposite to the backward push of

the back wheel on the road?

• the force exerted by the cyclist on the pedals

• the forward push of the road on the back wheel

• the tension in the cycle chain

• the total air resistance and friction force

The diagrams show three forces acting on a body.

In which diagram is the body in equilibrium?

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• 
• 
• 

What is meant by the weight of an object?

• the gravitational field acting on the object

• the gravitational force acting on the object

• the mass of the object multiplied by gravity

• the object’s mass multiplied by its acceleration

• 209 kN s

• 373 kN s

• 427 kN s

• 1045 kN s

• 4ms–1

• 5ms–1

• 6ms–1

• 8ms–1

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• 
• 
• 

• 500 N

• 1000 N

• 10 000 N

• 10 500 N