# Work Power and Energy Class 8 MCQ Science

30 Questions 20 Mins

This Work Power and Energy Class 8 MCQ test contains random 30 Objective Questions. You have select one correct answer among given options.

## Work Power and Energy Class 8 MCQ With Answers

### 1. What will be the formula if we are finding the TIME using the formula of power?

• Time = work donepowerTime\ =\ \frac{work\ done}{power}Time = powerwork done​
• Time = powerwork doneTime\ =\ \frac{power}{work\ done}Time = work donepower​
• Time = work x powerTime\ =\ work\ x\ powerTime = work x power
• All of above

### 2. Which of the following statements show kinetic energy?

• The battery of a lit flashlight
• A golf ball placed at the edge of the hole
• A river flowing down a hill
• Both A & B

### 3. What are the factors that can affect the power?

• Work done and time
• Work done and velocity
• Work done and force
• None of these

### 4. What will be the formula if we are finding the TIME using the formula of power?

• Time = work donepowerTime\ =\ \frac{work\ done}{power}Time = powerwork done​
• Time = powerwork doneTime\ =\ \frac{power}{work\ done}Time = work donepower​
• Time = work x powerTime\ =\ work\ x\ powerTime = work x power
• All of above

• Joules
• Newton
• Watts
• All of above

### 6. When did an object have more kinetic energy?

• When the time given on an object doubled
• When the mass of an object doubled
• When the mass of an object becomes half
• All of above

### 7. What are the two necessary conditions for work to be done?

• Force and Velocity
• Force and Displacement
• Force and Time
• None of these

• Joules
• Newton
• Watts
• All of above

### 9. In comparing of table tennis ball and tennis ball, which ball covered a longer distance once it was placed in a slope?

• table tennis ball
• tennis ball
• same distance
• All of above

### 10. What are the factors affect gravitational potential energy?

• Mass and Velocity
• Mass, Acceleration due to gravity, and Height
• Mass, Acceleration due to gravity and Time
• None of these

### 11. When did an object have more kinetic energy?

• When the time given on an object doubled
• When the mass of an object doubled
• When the mass of an object becomes half
• All of above

### 12. In comparing of table tennis ball and tennis ball, which ball covered a longer distance once it was placed in a slope?

• table tennis ball
• tennis ball
• same distance
• All of above

### 13. What are the factors that can affect the power?

• Work done and time
• Work done and velocity
• Work done and force
• None of these

### 14. Which of the following statements show kinetic energy?

• The battery of a lit flashlight
• A golf ball placed at the edge of the hole
• A river flowing down a hill
• Both A & B

### 15. What are the two necessary conditions for work to be done?

• Force and Velocity
• Force and Displacement
• Force and Time
• None of these

### 16. What are the factors affect gravitational potential energy?

• Mass and Velocity
• Mass, Acceleration due to gravity, and Height
• Mass, Acceleration due to gravity and Time
• None of these