Grade 9 Motion & energy worksheet

What is on the worksheet

1. A perpendicular force of 695 N acts over 5 m². Find the pressure in Pa.

2. Lift a 8 kg mass vertically by 6 m. Using g = 10 m/s², find the increase in gravitational potential energy in J.

3. A spring has constant 350 N/m and extension 14 cm within its linear range. Find the restoring-force magnitude in N.

4. A mass of 17 kg has velocity -17 m/s. Find its signed momentum in kg·m/s.

5. A 9 kg sample has specific heat 800 J/(kg·°C). Its temperature rises 25°C with no phase change. Find the energy gained in J.

6. A device transfers 104 J in 13 s. Find average power in W.

7. A 4 kg sample has specific heat 200 J/(kg·°C). Its temperature rises 20°C with no phase change. Find the energy gained in J.

8. A device transfers 1134 J in 14 s. Find average power in W.

9. Velocity changes from 1 m/s to 73 m/s in 9 s. Find average acceleration in m/s².

10. A mass of 49 kg has velocity 5 m/s. Find its signed momentum in kg·m/s.

11. A 3 kg sample has specific heat 800 J/(kg·°C). Its temperature rises 4°C with no phase change. Find the energy gained in J.

12. A mass of 38 kg has velocity -30 m/s. Find its signed momentum in kg·m/s.

13. A constant 36 N force acts in the same direction as a 16 m displacement. Find work in J.

14. A mass of 20 kg has velocity 9 m/s. Find its signed momentum in kg·m/s.

15. A constant 91 N force acts in the same direction as a 27 m displacement. Find work in J.

16. An object moves at constant velocity 29 m/s for 5 s. Find displacement in m.

17. Lift a 27 kg mass vertically by 18 m. Using g = 10 m/s², find the increase in gravitational potential energy in J.

18. A device transfers 518 J in 7 s. Find average power in W.

19. A mass of 21 kg has velocity -11 m/s. Find its signed momentum in kg·m/s.

20. An object of mass 24 kg accelerates at 6 m/s². Find the net force in N.