1) A small, 300 g cart is moving at 1.10 m/s on an air track when it collides wi

Question

1) A small, 300 g cart is moving at 1.10 m/s on an air track when it collides with a larger, 5.00 kg cart at rest. After the collision, the small cart recoils at 0.820 m/s. Part A: What is the speed of the large cart after the collision? the answer must be v=--------m/s 2) A 9.7 kg dog takes a nap in a canoe and wakes up to find the canoe has drifted out onto the lake but now is stationary. He walks along the length of the canoe at 0.48 m/s, relative to the water, and the canoe simultaneously moves in the opposite direction at 0.18 m/s. What is the mass of the canoe? m=------kg 3) A kid at the junior high cafeteria wants to propel an empty milk carton along a lunch table by hitting it with a 2.9g spit ball. If he wants the speed of the 20 g carton just after the spit ball hits it to be 0.30 m/s, at what speed should his 2.9 g spit ball hit the carton ? Show steps v=-----m/s

Explanation / Answer

from momentum conservation:

.3 *1.10 = .3*.82 + 5*v

v = .0108

b) 9.7*.48 = (9.7+m)*.18

m = 16.16

c) 2.9*v = 20*.3

v = .31

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