
#1
Nov909, 12:32 PM

P: 12

Hello there, I am having difficulty with this question:
A 0.2 kg plastic cart (Cart a) and a 20 kg (Cart b) lead cart can both roll without friction on a horizontal surface. Equal forces are used to push the two carts forward for a distance of 1 m, starting from rest. Which cart has the greater momentum, after the full 1m? So I was thinking that since you apply equal forces to push the two carts, Cart A would have a higher velocity. But when you do the momentum of the two carts together, the larger mass of cart B would make up for the difference of velocity. If I'm right about the velocity thing that is. mava = 0.2Va(>vb) mbvb = 20Vb(<va) So the momentum would be somewhat equal? 



#2
Nov909, 01:04 PM

Mentor
P: 40,878





#3
Nov909, 01:33 PM

P: 12

The force applied and the rate of deceleration?




#4
Nov909, 01:39 PM

Mentor
P: 40,878

Momentum ProblemBut another way is to recognize what force*distance gives you, and use that to figure out the velocity and momentum. 



#5
Nov909, 01:48 PM

P: 12

Ahh so you mean work done is the same. I think I get it now. Thanks!



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