other

Question 1

momentum

Answer 1

• measure of the amount of motion possessed by a moving body, it is the product of mass x velocity
• an object can only have momentum if its moving
• the greater the momentum, the more force next to be applied to either stop/ slow object down
• as a result, when 2 bodies collide, the one with the most momentum will be least effected

Question 2

impulse

Answer 2

FORCE TIME
- the application of force over a period of time to change the momentum of an object
impulse= force x time
1- impulse creates momentum- increase the momentum of an object from zero
2- changing momentum- increasing/ decreasing momentum of a moving object
3- stopping momentum- taking momentum back to zero

Question 3

increasing momentum

Answer 3

• to maximise the momentum of an object, one must aim to increase both the force and time components
• force is increased through effective summation of forces and improved strength
• time is increased through techniques and equipment modifications

Question 4

increasing momentum example

Answer 4

to increase the change in momentum in sports like archery, athletes will draw the bowstring back to allow more time for the force of the bow applied to the arrow, this ensures the arrow will travel at greater speeds and cover larger distances

Question 5

decreasing momentum

Answer 5

to reduce the momentum of an object, one typically looks to increase the time component
- a cricketer ball is hit towards a fielder, the fielder wishes to stop the ball/ take the momentum back to zero

Question 6

real life examples

Answer 6

• the foam inside running shoes increases the time force is applied by the foot and helps absorb the impact forces, reducing the peak force- reduces likelihood of injury
• padding on high jump and pole vault mat increase the time the force is applied and reduces the peak force experienced by the body- reduces likelihood of injury

Question 7

conservation of linear motion

Answer 7

the principal states the total momentum of 2 object before and after impact are equal
- the momentum of one object is transferred on contact to the other object, resulting is no change in total momentum but rather a transfer of momentum