Impulse Momentum Theorem

Impulse-Momentum Theorem

Learning Target

​To use the impulse-momentum change equation

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• to analyze a collision in order to determine an unknown quantity in a collision problem.

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• ​ as a guide to thinking about how a change in one quantity affects another quantity.

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Multiple Select

How could you decrease the force on an object in a collision?

(Choose two options.)

• increase collision time

• decrease collision time

• increase change in momentum

• decrease change in momentum

Multiple Choice

Most modern vehicles have padded dashboards. This reduces collision injuries by...

• reducing the driver's change in momentum

• increasing the driver's change in momentum

• increasing the force of impact

• increasing the time of impact

Multiple Choice

A boy kicks a football with a force of 20 N, the time the force acts for is 0.3 s.
Calculate the impulse on the ball.

• 1 N*s

• 6 N*s

• 33.3 N*s 

• None of these

Fill in the Blanks

What impulse occurs when an average force of +11.0 N is exerted on a cart for 2.50 s?

Fill in the Blanks

Δp = FΔt = mΔv

You are in a 15,000 kg car traveling at +12 m/s and come to a stop, what is the force required to stop the vehicle in 6 seconds?

Include units and direction. Don't worry about sig figs

Fill in the Blanks

Δp = FΔt

You are in a 15,000 kg car traveling at +12 m/s and come to a stop. What is the force required to stop the vehicle if you collide with the vehicle in front of you and the collision takes 0.050 seconds?

Include units, direction, and round for sig figs.

Fill in the Blanks

Δp = FΔt

You are in a 15,000 kg car traveling at 12 m/s. A semi-truck (36,000 kg) is in the next lane traveling at the same speed. How much time will it take the semi to stop if they apply 30,000 N of force? 

Multiple Choice

A 17,000 kg car was traveling down the highway. If it took 7.0 seconds to stop with a force of -24,000 N, what was the initial velocity?

• +9.9 m/s

• +170,000 m/s

• +1.4 m/s

• +0.20 m/s

Fill in the Blanks

A force of 11 N is exerted on a cart for 2.5 s, if the mass of the cart is 4.4 kg and the cart is initially at rest, calculate the final speed.