The three air carts shown in the figure ( Figure 1 ) have masses, reading from l

Question

The three air carts shown in the figure(Figure 1) have masses, reading from left to right, of m, 2m, and 4m, respectively. Initially, the cart on the right is at rest, whereas the other two carts are moving to the right with a speed v0. All carts are equipped with putty bumpers that give completely inelastic collisions.

Find the final speeds of the cart.

(Express your answer in terms of or all the variables Vo and m)

Calculate the ratio of the final kinetic energy of the system to the initial kinetic energy.

(Express your answer using three sig figs)

The three air carts shown in the figure(Figure 1) have masses, reading from left to right, of m, 2m, and 4m, respectively. Initially, the cart on the right is at rest, whereas the other two carts are moving to the right with a speed v0. All carts are equipped with putty bumpers that give completely inelastic collisions. Find the final speeds of the cart. (Express your answer in terms of or all the variables Vo and m) Calculate the ratio of the final kinetic energy of the system to the initial kinetic energy. (Express your answer using three sig figs)

Explanation / Answer

3mVo=7mv

So v=3Vo/7

ratio KE= 7mv^2/(3mVo^2)=3/7

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