Force & Motion - Quiz 1: PRS

Force (F) is measured in units called

• Joule (J)

• kilogram (kg)

        

•      Newton (N)

• Watt (W)

Speed (v) is measured in units called

• N

• ms^-2

• ms^-1

• J

Acceleration (a) is measured in units called

• ms^-2

• J

• ms^-1

• N

The action of a force is a push, a _____________ or a twist.  

• pull

• thrust

Speed can only be changed by an ________________ force.

• Balanced

• Unbalanced

An object will hold its shape only if all the forces acting on it are ________

• Balanced

• Unbalanced

Which of the following statements is the best definition of weight? w = mg

• It is the amount of matter in an object.

• It is the force a moving object will exert on a non-moving object

• It is the force of gravity acting on a mass.

• It is the force that causes objects to fall.

  Which one of the following statements about gravity is TRUE?  

• Gravity acts in many different directions.

• Gravity has the same size of force no matter how far away from the earth you are.

•  Gravity is a force of attraction only.

• Objects must touch in order for gravity to act.

 What is mass and weight? Describe how you would calculate an objects weight

• multiply mass x 10

• divide mass by 10

 Which one of the following statements about friction is TRUE?

•  It can accelerate objects.

• It is a force that can act at a distance between two objects.

• It operates in the same direction of motion as a moving object.

• Where there is friction between moving objects, heat is produced.