Quiz about Unit-7 Energy Transformations and Calculations Quiz

Question 1

A 2 kg object is moving with a velocity of 3 m/s. Calculate its kinetic energy.

Accepted Answer

9 J

Answer

6 J

Answer

12 J

Answer

18 J

Question 2

A 5 kg object is lifted to a height of 10 meters. Calculate its potential energy. (Use gravitational acceleration $$g = 9.8 \, ext{m/s}^2$$ )

Accepted Answer

490 J

Answer

500 J

Answer

510 J

Answer

520 J

Question 3

Which of the following devices is designed to convert electrical energy into mechanical energy?

Accepted Answer

Electric motor

Answer

Solar panel

Answer

Battery

Answer

Wind turbine

Question 4

A 10 kg object is moving at a velocity of 4 m/s. What is its kinetic energy?

Accepted Answer

80 J

Answer

40 J

Answer

60 J

Answer

100 J

Question 5

A hydroelectric dam converts potential energy of water into which form of energy?

Accepted Answer

Electrical energy

Answer

Thermal energy

Answer

Chemical energy

Answer

Nuclear energy

Question 6

Calculate the potential energy of a 3 kg object at a height of 15 meters. (Use gravitational acceleration $$g = 9.8 \, ext{m/s}^2$$ )

Accepted Answer

441 J

Answer

450 J

Answer

460 J

Answer

470 J

Question 7

Which of the following is an example of a device that converts chemical energy into electrical energy?

Accepted Answer

Battery

Answer

Wind turbine

Answer

Solar panel

Answer

Electric motor

Question 8

A 4 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?

Accepted Answer

100 J

Answer

25 J

Answer

50 J

Answer

75 J

Question 9

Which device is primarily used to convert solar energy into electrical energy?

Accepted Answer

Solar panel

Answer

Wind turbine

Answer

Generator

Answer

Battery

Question 10

Calculate the potential energy of a 7 kg object at a height of 8 meters. (Use gravitational acceleration $$g = 9.8 \, ext{m/s}^2$$ )

Accepted Answer

548.8 J

Answer

550 J

Answer

552 J

Answer

554 J

Question 11

A wind turbine is designed to convert which form of energy into electrical energy?

Accepted Answer

Mechanical energy

Answer

Thermal energy

Answer

Chemical energy

Answer

Nuclear energy

Question 12

A 6 kg object is moving at a velocity of 2 m/s. What is its kinetic energy?

Accepted Answer

12 J

Answer

6 J

Answer

18 J

Answer

24 J

Question 13

Which of the following devices is used to convert mechanical energy into electrical energy?

Accepted Answer

Generator

Answer

Battery

Answer

Solar panel

Answer

Electric motor

Question 14

Calculate the potential energy of a 2 kg object at a height of 20 meters. (Use gravitational acceleration $$g = 9.8 \, ext{m/s}^2$$ )

Accepted Answer

392 J

Answer

400 J

Answer

408 J

Answer

416 J

Question 15

A device that converts thermal energy into mechanical energy is known as a:

Accepted Answer

Heat engine

Answer

Solar panel

Answer

Battery

Answer

Electric motor

Question 16

Ty lifts a set of 1250kg weights a vertical distance of 2m in a weight lifting contest. What Potential Energy do the weights now possess?

Accepted Answer

24,500 Joules

Answer

12,789 Joules

Answer

4,500 Joules

Question 17

Alice kicks a soccer ball with a mass of 2.1 kg. The ball leaves the ground moving 30 meters per second. What is the kinetic energy of the soccer ball?

Accepted Answer

945 J

Answer

567 J

Answer

900 J

Answer

30 J

Question 18

Lilly's cat ran through your yard. The cat has a mass of 5 kg. He is running at a speed of 3 m/s. What is the kinetic energy of the cat as he runs?

Accepted Answer

22.5 J

Answer

8.5 J

Answer

45 J

Answer

7.5 J

Unit-7 Energy Transformations and Calculations Quiz

21 questions

A 2 kg object is moving with a velocity of 3 m/s. Calculate its kinetic energy.

Which of the following devices is designed to convert electrical energy into mechanical energy?

A 10 kg object is moving at a velocity of 4 m/s. What is its kinetic energy?

A hydroelectric dam converts potential energy of water into which form of energy?

Which of the following is an example of a device that converts chemical energy into electrical energy?

A 4 kg object is moving with a velocity of 5 m/s. What is its kinetic energy?

Which device is primarily used to convert solar energy into electrical energy?

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