- #1
pureouchies4717
- 99
- 0
hey guys. here's the problem:
heres what i tried:
p(bullet)=mv
p= 8 (initially)
p(bullet)=mv
= 4 (after impact)
the bullet exerted a momentum of 4 onto the cart.
p(cart)= mv
4= 200v
v=.02m/s after getting shot at by one bullet
19/.02= 950 bullets that need to be fired in order for the car to move at 19m/s
950 bullets/20= 47.5 bullets per second
however, this is wrong
question said:A 20 g bullet is shot at a cart that is 200 kg. The cart is on a frictionless surface and is able to move freely. The bullet travels at 400m/s and bounces back with 200m/s after the collision. The design objective is for the cart to reach a speed of 19.0 m/s in 20.0 s. You need to tell them how many bullets to fire per second from the machine gun.
heres what i tried:
p(bullet)=mv
p= 8 (initially)
p(bullet)=mv
= 4 (after impact)
the bullet exerted a momentum of 4 onto the cart.
p(cart)= mv
4= 200v
v=.02m/s after getting shot at by one bullet
19/.02= 950 bullets that need to be fired in order for the car to move at 19m/s
950 bullets/20= 47.5 bullets per second
however, this is wrong