1. A baseball with a mass of 0.14 kg is moving at +35 m/s. Calculate the momentu

Question

1. A baseball with a mass of 0.14 kg is moving at +35 m/s. Calculate the momentum of the baseball.



2. Find the velocity a 7.26 kg bowling ball must have to have the same momentum as the baseball.



3. What is the momentum of a small car, mass 725 kg, is moving at 100 km/h.



4. A cannon with a mass of 1200 kg fires a 53 kg ball at speed of +67 m/s. What is the momentum of the ball?



5. In 1987, Marisa Canofoglia, of Italy, roller-skated at a record –setting speed of 40.3 km/h. If the her momentum was 660 kg×m/s, what was her mass?



6. One of the smallest planes ever flown was the Bumble Bee II, which had a mass of 180 kg. What was the velocity of the plane if its momentum was 2.08×104 kg×m/s?



7. The first human-made satellite, Sputnik I, had a mass of 83.6 kg. How fast does it go if its momentum is 6.63×105 kg×m/s?



8. Among the largest passenger ships in use, the Norway has been in service the longest. The Norway is more than 300 m long, has a mass of 6.9×107 kg, and can reach a cruising speed of 33 km/h. Calculate the ship’s momentum.




9.In 1994, a tower 22.13 m tall was built of LEGO blocks. Suppose a block with a mass of 2.00 g fell from this height. Ignoring air resistance, calculate the block’s momentum at the instant the block hits the ground.

Explanation / Answer

1. momentum = 0.14*35 = 4.9 kg.m/s
2. 7.26*v=4.9 v=0.675 m/s
3. momentum= 725*100*1000/3600 kg.m/s = 20138.89 kg.m/s
4. momentum = 53*67 = 3551 kg.m/s
5.mass= 660/(40.3*1000/3600) = 58.9578 kg
6.velocity = 2.08*104/180 = 1.202 m/s
7.velocity = 6.63*105/83.6=8.327m/s
8. momentum = 6.9*107*33*1000/3600 = 6767.75 kg.m/s
9.v2=u2+2as , u=0

v= 2*9.81*22.13 = 20.83 m/s

momentum = (2/1000)*20.83 = 0.04166 kg.m/s

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