Question 1: What is the momentum of a 1,339-kg car moving at 34 mph? (Use kg*m/s

Question

Question 1: What is the momentum of a 1,339-kg car moving at 34 mph? (Use kg*m/s as units.)

QUESTION 2 What is the momentum of a 5.19-ounce baseball at 92 mph?

QUESTION 3 A 11-g bullet is fired from a 3.77-kg rifle. After the bullet leaves the rifle, it moves at a speed of 292 m/s. What is the bullet's momentum?

QUESTION 4 A 12-g bullet is fired from a 3.19-kg rifle. After the bullet leaves the rifle, it moves at a speed of 301 m/s. What is the magnitude of the impulse imparted on the rifle?

QUESTION 5 The Marlin's Jarrod Saltalamacchia catches a 86-mph fast 5.24-ounce baseball. What is the impulse imparted on his hand and glove? 5.44kgm/s

QUESTION 6 You took a job as a space station scientist. On a spacewalk you get separated from the station. You are throwing a 0.59-kg wrench at a speed of 11 m/s in the opposite direction than the space station. At what speed will you move back toward the station? Assume that your total weight on earth, including the space suit, is 275 lbs.

Explanation / Answer

Question 1. Momentum of car = m*v = 1339*15.2 = 20352.8 kg m/s

Question 2.   Momentum of baseball = m*v = 0.147134*41.13 = 6.052 kgm/s

Question 3.   Momentum of bullet = m*v = 0.011*292 = 3.212 kgm/s

Question 4. Impulse I=m(vf-vi) = 0.012*301 = 3.612 kgm/s

Question 5.    Impulse I=m(vf-vi) = 0.14855*38.4454 = 5.71 kgm/s

Question 6. 275 lb = 124.74 kg
By conservation of momentum ..
Momentum gained by wrench = Momentum gained by you in opposite direction

0.59 kg x 11.0m/s = (-) 124.74 kg x v

v = 0.052 m/s

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