Ch 12 Math Skills: Momentum

NAME ______DATE ______Ch 12 Math Skills: Momentum

Solve each of the practice problems. SHOW YOUR WORK AND CIRCLE YOUR ANSWERS. HALF CREDIT WILL BE TAKEN OFF FOR ANSWERS WITHOUT UNITS.

1. A pitcher in a professional baseball game throws a fastball, giving the baseball a momentum of 5.83 kg•m/s. Given that the baseball has a mass of 0.145 kg, what is its speed? p = m = v =

2. The most massive automobile to have been manufactured on a regular basis was the Russian-made Zil-41047. If one of these cars was to move at just 8.9 m/s, its momentum would be 26,700 kg•m/s. Use this information to calculate the mass of a Zil-41047. p = m = v =

3. In 1996, Michael Johnson ran 200.0 m in 19.32 s. Johnson’s mass at the time of his record-breaking run was about 77 kg. What was his momentum at his average speed? (hint: you have to calculate speed first!) p = m = v =

4. Although it cannot sustain its top speed for more than 8.65 s, the cheetah can run a distance of 274 m during that time. If a cheetah with a mass of 50.0 kg is moving at top speed, what is its momentum? (hint: you have to calculate speed first!) p = m = v =

5. A 1300 kg race car is traveling at 80 m/s while a 15,000 kg truck is traveling at 20 m/s. Which has the greater momentum? p = m = v =

6. A 300 kg snowmobile is traveling at 30 m/s. How fast would a 200 kg snowmobile need to travel to have the same momentum? p = m = v =

Original content Copyright © by Holt, Rinehart and Winston. Additions and changes to the original content are the responsibility of the instructor. Holt Science Spectrum 78 Forces 7. A particle has a mass of 10 kg and a velocity of 5 m/s. What is the momentum of the particle? p = m = v =

8. Which of the following has the greatest momentum: a 500 kg car moving at 64 km/h, a 250 kg cart moving at 128 km/h, or a 1,000 kg truck moving at 32 km/h. Explain your answer. p = m = v =

9. Calculate the velocity of a 90.5 kg man running south with a momentum of 389 kg•m/s. p = m = v =

10. What is the momentum of a 0.255 kg apple falling at 16.0 m/s? p = m = v =

11. A 1.0 kg ball has a momentum of 12 kg•m/s. What is the ball's speed? p = m = v =

12. A 1.5 kg ball is thrown at 10 m/s. What is the ball's momentum? p = m = v =

13. A ball is moving at 7.0 m/s and has a momentum of 100 kg•m/s. What is the ball's mass? p = m = v =