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Your little sister (mass 25.0 $\mathrm{kg}$ ) is sitting in her little red wagon (mass 8.50 $\mathrm{kg} )$ at rest. You begin pulling her forward and continue accelerating her with a constant force for 2.35 $\mathrm{s}$ at the end of which time she's moving at a speed of 1.80 $\mathrm{m} / \mathrm{s}$ .(a) Calculate the impulse you imparted to the wagon and its passenger. (b) With what force did you pull on the wagon?

a) 60.3 $\mathrm{N} \cdot \mathrm{s}$b) $[25.66 \mathrm{N}$

Physics 101 Mechanics

Chapter 8

Momentum

Physics Basics

Kinetic Energy

Potential Energy

Energy Conservation

Moment, Impulse, and Collisions

Cornell University

University of Michigan - Ann Arbor

University of Sheffield

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So your sister off mass 25 kilograms is sitting in a cart off my ass. 8.5 kilograms. Hence, this total system has a mass of 25 plus 8.5, just 33 150 kilograms. It's just hard to find. No, initially it was interest, which means the initial velocity zero and hence the initial moment of zero. Now, after you away the force for a time period off 2.35 seconds. This card is moving at a velocity off 118 which is the final velocity is 1.8. Be interesting. Now we want to find out the impulse you imparted. You know that impulse is simply the changing moment of which means finally, moment of minus the initial order. You know that the initial on Devon zero anyway, hence, this is just the final one, which is mass times velocity, which is mass just 30 30.5 kilograms multiplied by velocity, which is 1.8 made of a second, which gives us 60.3. Hey, Jimmy, Diversity. Now that we have this for body, we want to find out the magnitude of the force. The force applied. You know, that impulse is fourth times three temporary for which it was applied. It is actually integral off the force over time. But anarchist, the forces constant and hence we can regular, simply force multiplied by the duration ofthe time it was a fight for has Now that we know impulse on the time figure, we confined the force our impulses 61 3 kg meter per second and that is a little force. Times 2135 seconds. Which means our force is 61 3 Developed by 2135 It's Chancellor. Do we define on seven unions? Now that I've rounded it down to three? Significant it It's because our numbers in the question how tracing the bandages

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