Force Time Relationship

Question 1

What is the equation for an impulse?

Answer 1

Impulse = Force x Time.

Question 2

What is an impulse?

Answer 2

It is the change in momentum.

Question 3

What can cause an increase in the impulse?

Answer 3

A larger impulse will be created by increasing the range of motion which ensures maximum force is applied but over a short period of time. If an athlete increases the duration of contact with the object through the help of a wide stance, this will increase the impulse but the force generated will be low.

Question 4

What is an example of a skill that produces a large force over a short period of time?

Answer 4

A hockey hit.

Question 5

What is an example of a skill that produces a smaller force over a longer period of time?

Answer 5

A drag flick.

Question 6

Draw a graph demonstrating an action with a large force applied over a short period of time.

Answer 6

Diagram.

Question 7

Draw a graph demonstrating an action with a small force applied over a long period of time.

Answer 7

Diagram.

Question 8

How can force absorption be reduced?

Answer 8

By minimising the impulse by absorbing the force over a longer period of time.

Question 9

What is an example of force absorption?

Answer 9

When a cricket ball is hit toward a fielder they wish to stop the ball and take the momentum back to zero. When stopping a force we must increase the time component so we can reduce the peak force.

Question 10

List 3 examples of other sports where force absorption occurs.

Answer 10

1. Running shoes.
2. Crumple zones in racing cars.
3. Sprung floors in gymnstatics.