P2.2

Question 1

What does the kinetic energy of an object depend on?

Answer 1

~ The mass of the object (kg)

~ The speed of the object (m/s)

Question 2

Work done against frictional forces is mainly transferred into what?

Answer 2

Heat energy

Question 3

What is momentum?

Answer 3

A measure of the state of motion of an object

Question 4

What does momentum depend on?

Answer 4

~ The mass of the object (kg)

~ The velocity of the object (m/s)

Question 5

Providing that no external forces act, momentum is what?

Answer 5

Conserved

Question 6

When is work done?

Answer 6

When a force causes an object to move through a distance

Question 7

What is work done against?

Answer 7

Frictional forces

Question 8

What is momentum a property of?

Answer 8

Moving objects

Question 9

What is the unit for momentum?

Answer 9

Kg m/s

Question 10

What does the conservation of momentum mean?

Answer 10

The total momentum before a collision/explosion is equal to the total momentum after the collision/explosion