Class Management Help HW 2 Begin Date: 1/1/2018 12:00:00 AM Due Date: 1/18/2018
ID: 1661185 • Letter: C
Question
Class Management Help HW 2 Begin Date: 1/1/2018 12:00:00 AM Due Date: 1/18/2018 11:59:00 PM End Date: 3/12/2018 11:59:00 PM (2000) Problem 1: Imagine a shopping cart of mass m, moving at a velocity v (to the right) running into a second shopping cart, of mass 3m, which is at rest After the collision, if the first shopping cart moving at a velocity v 2 towards the left how much impulse did the second cart deliver to the first? ONone. The larger cart was at rest and had to momentum to give to the lighter one 3/2mv to the left. Grade Summary Deductions Potential 0% 100% 1/2mv to the left. Submissions ONone. The lighter cart gave momentum to the heavier cart, not the other way around. Attempts remaining (25% per attempt) detailed view my to the left Submit Hint I give up! Hints: 3 %-deduction per hint. Hints remaining: Feedback: 300 deduction per feedback.Explanation / Answer
mass of first cart m1 = m
initial velocity u1 = v
final velocity v1 = -v/2
mass of fsecond cart m2 = 3m
initial velocity u2 = 0
final velocity v2 = ?
from conservation of momentum =m1*u1 +m2*u2=m1*v1 +m2*v2
m*v +0=m*-v/2+3m*v2
v2 = v/2
impulse exerted by second cart = change inmomentum of secondcart= m2*(u2-v2)
= 3m*(0-v/2)=-3mv/2
so (3/2)*mv to the left <<<<<--------ANSWER