Show your work for the following math problems:
#2 SHOW YOUR WORK, box your answers FOR THE FOLLOWING MATH PROBLEMS:
!!DO NOT WRITE ON THIS PAPER!!
1. A girl lifts a 10 N load a height of 2.0 m in 3 seconds. What power does the girl produce?
2. How much work is done when a 15-watt light bulb is lit for 150 seconds?
3. If you do 50 J of work in 1.2 seconds, How much power is produced?
4. You apply 220 N of force to push a cart of bricks that weighs 680 N a distance of 10 m. How much work is done?
5. What power is used by a machine to perform 800 J of work in 420 seconds?
6. How much power is used to push a 2500-kg car with a force of 650 N a distance of 65 m in 300 seconds?
7. A boy with mass is 60-kg skates around a rink at a speed of 10 m/s. How much kinetic energy does he have?
8. A .54-kg toy car rolls at a speed of 1.8 m/s. What is the kinetic energy of the car?
9. What is the kinetic energy of a 20.75-kg bike that is moving at a speed of 3.5 m/s?
10. How much kinetic energy does a .75-kg ball rolling at 6.7 m/s have?
11. A 5.95-kg object is moving at a speed of 12.6 m/s. What is the kinetic energy of the object?
12. A ball that weighs 2 N sits on a shelf that is 5 m high. How much potential energy does the ball have?
13. What is the potential energy of a box that has a mass of 10-kg sitting at the top of a hill that is 2 m high?
14. What is the potential energy of a 16-kg object at the top of a building that is 30 m high?
15. A .036 kg glass is on a window ledge that is 25 m high. What is the potential energy of the glass?
16. What is the potential energy a book that weighs 5 N that is sitting on a desk that is .76 m high?
17. How much work do you do when you push a 20-kg box 4 meters across the floor?
18. A power shovel did 4,000 J of work, exerting a force of 40 N. How high did the shovel lift the load?
19. If you lift a 13 N box a distance of .75 m, how much work do you do?
20. How much work is done when a 5-kg ball is used to push a milk carton 2.5-m across the floor?
#2 SHOW YOUR WORK, box your answers FOR THE FOLLOWING MATH PROBLEMS:
!!DO NOT WRITE ON THIS PAPER!!
1. A girl lifts a 10 N load a height of 2.0 m in 3 seconds. What power does the girl produce?
2. How much work is done when a 15-watt light bulb is lit for 150 seconds?
3. If you do 50 J of work in 1.2 seconds, How much power is produced?
4. You apply 220 N of force to push a cart of bricks that weighs 680 N a distance of 10 m. How much work is done?
5. What power is used by a machine to perform 800 J of work in 420 seconds?
6. How much power is used to push a 2500-kg car with a force of 650 N a distance of 65 m in 300 seconds?
7. A boy with mass is 60-kg skates around a rink at a speed of 10 m/s. How much kinetic energy does he have?
8. A .54-kg toy car rolls at a speed of 1.8 m/s. What is the kinetic energy of the car?
9. What is the kinetic energy of a 20.75-kg bike that is moving at a speed of 3.5 m/s?
10. How much kinetic energy does a .75-kg ball rolling at 6.7 m/s have?
11. A 5.95-kg object is moving at a speed of 12.6 m/s. What is the kinetic energy of the object?
12. A ball that weighs 2 N sits on a shelf that is 5 m high. How much potential energy does the ball have?
13. What is the potential energy of a box that has a mass of 10-kg sitting at the top of a hill that is 2 m high?
14. What is the potential energy of a 16-kg object at the top of a building that is 30 m high?
15. A .036 kg glass is on a window ledge that is 25 m high. What is the potential energy of the glass?
16. What is the potential energy a book that weighs 5 N that is sitting on a desk that is .76 m high?
17. How much work do you do when you push a 20-kg box 4 meters across the floor?
18. A power shovel did 4,000 J of work, exerting a force of 40 N. How high did the shovel lift the load?
19. If you lift a 13 N box a distance of .75 m, how much work do you do?
20. How much work is done when a 5-kg ball is used to push a milk carton 2.5-m across the floor?
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