A-LEVEL PHYSICS: 4.5.3: Impulse (SaveMyExams)

Question 1

Force can also be defined as the Rate of Change of…

Answer 1

Momentum.

Question 2

Change in Momentum = …

Answer 2

p2 - p1

REMEMBER that Momentum is a Vector, ∴ you can have =ve & -ve Momentum

Question 3

What is ‘Impulse’?

Answer 3

Impulse is the Change of Momentum.

Question 4

Impulse Equation:

Answer 4

F = Δp/Δt

Question 5

When an External ___ ___ acts on an object for a very short time, & Changes the object’s Motion, we call this…

Answer 5

Resultant Force, Impulse.

Question 6

Examples of Impulse:

Answer 6

-Kicking a Ball
-Catching a Ball
-Collision between 2 objects

Question 7

Impulse = …

Answer 7

FΔt

Force * Change in Time

Question 8

Impulse is a ___ Quantity.

Answer 8

Vector.

Question 9

The Impulse is always in the Direction of the…

Answer 9

Resultant Force.

Question 10

F=Δp/Δt

Therefore…

Answer 10

a Small Force acting over a Long Time = a Large Force acting over a Short Time

Question 11

The Concept of Impulse is used to Prevent…

Answer 11

Injury.

Question 12

The concept of Impulse is used to prevent injury. eg, in Cricket…

Answer 12

The guy moves their hand back as they catch the ball, to Increase the Time over which the Impulse Acts (∴ Decreasing the Force).