test: newtons laws

Question 1

push or pull forces can alter a body (object) in the following ways:

Answer 1

cause a body to:
- move
- accelerate
- decelerate
- change direction
- change shape

Question 2

what is newtons first law of motion? describe

Answer 2

law of inertia

a body continues in a state of rest or uniform velocity unless acted upon by an external force

Question 3

define: inertia

Answer 3

the resistance of a body to change its state of motion whether at rest or moving

Question 4

sporting examples for newtons first law of motion

Answer 4

• a football will stay on the penalty spot until kicked
• a hockey ball will remain still unless hit by the stick

Question 5

what is newtons second law of motion? describe

Answer 5

law of acceleration

a body’s rate of change in momentum is proportional to the size of the force applied and acts in the same direction as the force applied

Question 6

define: momentum

Answer 6

the quantity of motion and is closely linked to acceleration

(mass x velocity)

Question 7

sporting examples for newtons second law of motion

Answer 7

• if you kick a football hard, it will go a long way and travel fast
• if you kick a football softly, it wont go very far and will travel slowly

Question 8

what is newtons third law of motion? describe

Answer 8

law of action reaction

every action has an equal and opposite reaction

Question 9

sporting examples for newtons third law of motion

Answer 9

a high jumper needs to push down on the ground to be able to go up