Impulse

Question 1

What is the definition of impulse?

Answer 1

The length of time a force is applied to an object

Question 2

What is the equation for impulse?

Answer 2

Impulse = force x time

Question 3

What are the details of impulse?

Answer 3

• Impulse is equal to a change of momentum (acceleration/deceleration acts on it)
• Positive impulse = if an individual or object is accelerated
• Negative impulse = if an individual or object is decelerated
• The longer the force is in contact (large impulse), the greater the acceleration or deceleration

Question 4

Give 2 examples of positive and negative impulse..

Answer 4

Positive = push pass in hockey, Discus spin 
Negative = Catching a ball in cricket, tackle in rugby

Question 5

Explain impulse and sprinting..

Answer 5

• Positive impulse is gained through ground-reaction force
• Negative impulse is gained through footfall
• If the GRF is larger than FF then the runner will accelerate
• If they are the same than the runner will be constant and will have a net impulse of zero

Question 6

Learn Force time graph

Answer 6

Learn force time graph