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A ball of mass $m$ traveling horizontally with velocity $\mathbf{v}$ strikes a massive vertical wall and rebounds back along its original direction with no change in speed. What is the magnitude of the impulse delivered by the wall to the ball?(A) $\frac{1}{2} m \mathbf{v}$(B) $m \mathbf{v}$(C) 2$m \mathbf{v}$(D) 4$m \mathbf{v}$

Physics 101 Mechanics

Chapter 6

Linear Momentum

Moment, Impulse, and Collisions

Simon Fraser University

University of Sheffield

University of Winnipeg

McMaster University

Lectures

04:16

In mathematics, a proof is…

04:48

In mathematics, algebra is…

03:16

A 0.15 kg ball hits a wall…

01:33

A 0.70 $\mathrm{kg}$ ball …

02:21

You are hitting a tennis b…

02:53

A 0.550 kg ball falls dire…

02:11

A 140 g ball with speed 7.…

03:50

A ball having a mass of 15…

06:08

(II) A tennis ball of mass…

02:27

A 1.2 $\mathrm{kg}$ ball d…

00:48

A ball of mass $5.0 \mathr…

our problem is a ball off mass m strikes evals with a velocity We and it rebounds with the same velocity and we are asked to find it Impulse delivered by the ball to the board. So I have return the final velocity as minus b here because velocity is a vector quantity. So here the direction off velocity changed. So to do you know that I have got under minus sign here. So we know that impulse is equal to changing moment. That is members I can be Return us changing moment. Um Beltre beat. So we have to find the change in momentum here so the w can be return us initial momentum minus final momentous insured moment amiss. Be a and final moment Amiss BF So what is the initial moment? I'm here. You know that moment? Um, is equal Do Maassen do bellows it so the initial momentum can be esoteric. Turn us M v this equal do moss into a velocity minus What is the final moment? Um here, Marcin do below city We just minus we so our final moment and becomes minus m indu we this becomes mass and velocity plus again m V. This is equal to two times and the to indoor I m we resist the the quick answer. So the impulse delivered by the boy to the board us two times and be

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In mathematics, a proof is a sequence of statements given to explain how a c…

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