Question

A cart of mass 500 kg experiences an impulse of 11N * s. Afterwards the cart is seen to move with a velocity of 12 m/s and is moving to the left.

a. What is the final momentum of the cart (remember the signs!)?

b. What is the carts initial momentum and initial velocity (Again, remember your signs!!)?

Answer 1

Answer :-- since the impulse = change in the momentum

so during the collision the change in momentum = 11 N-s =

NOW final momentum of the cart is = mass final velocity of the cart.

i.e. final momentum = 500 (-12) = -6000 kg-m/s .(where -ve sign indicates the motion toward left.).

• let initial momentum = p
• than change in momentum is given by
• 
• 
• 
• ................................(answer)
• now initial velocity is given as
• 
• 
• .......................(answer)