Calculations Involving Energy, Work, and Power Worksheet
Choose the correct answer for each question regarding calculations involving energy, work, and power:
1. What is the gravitational potential energy (E) of a 5 kg object raised to a height of 10 m?
A) 50 Joules
B) 100 Joules
C) 500 Joules
D) 1000 Joules
2. A car has a mass of 800 kg and is moving at a speed of 20 m/s. What is its kinetic energy (E)?
A) 160,000 Joules
B) 80,000 Joules
C) 320,000 Joules
D) 400,000 Joules
3. How much work (W) is done when a force of 50 N is applied to move an object 4 meters?
A) 200 Joules
B) 150 Joules
C) 250 Joules
D) 300 Joules
4. If 300 Joules of work is done in 15 seconds, what is the power (P) output?
A) 10 Watts
B) 15 Watts
C) 20 Watts
D) 25 Watts
5. A machine does 600 Joules of work in 30 seconds. What is its power (P)?
A) 15 Watts
B) 20 Watts
C) 25 Watts
D) 30 Watts
6. Calculate the potential energy (E) of a 10 kg object at a height of 5 m.
A) 50 Joules
B) 100 Joules
C) 150 Joules
D) 200 Joules
7. What is the kinetic energy (E) of a 2 kg object moving at a velocity of 3 m/s?
A) 3 Joules
B) 6 Joules
C) 9 Joules
D) 12 Joules
8. If a force of 100 N is used to move an object 5 meters, how much work (W) is done?
A) 200 Joules
B) 400 Joules
C) 500 Joules
D) 600 Joules
9. A light bulb uses 240 Joules of energy in 2 seconds. What is its power (P)?
A) 100 Watts
B) 120 Watts
C) 150 Watts
D) 200 Watts
10. How much work (W) is required to lift a 20 kg object to a height of 2 m? (Use g = 9.8 m/s²)
A) 196 Joules
B) 392 Joules
C) 588 Joules
D) 784 Joules
Instructions: Circle the letter of the correct answer for each question.