Chapter # 6 work & Energy

Work & Energy

Quiz

 

1. What is the SI unit of work?
   1.   Joule
   2.   Newton
   3.   Watt
   4.   Pascal
2. When is work done on an object?
   1.   When the object remains at rest
   2.   When there is no displacement
   3.   When a force acts on the object and it moves
   4.   When the object's speed is constant
3. What is the formula for calculating work?
   1.   Work = Force × Distance
   2.   Work = Mass × Velocity
   3.   Work = Power × Time
   4.   Work = Force × Acceleration
4. If a force of 10 N is applied to move an object 5 meters, how much work is done?
   1.   50 J
   2.   10 J
   3.   5 J
   4.   2 J
5. What is the SI unit of energy?
   1.   Watt
   2.   Newton
   3.   Joule
   4.   Pascal
6. Which of the following is a form of kinetic energy?
   1.   Chemical energy
   2.   Nuclear energy
   3.   Thermal energy
   4.   Gravitational potential energy
7. What type of energy is stored in a compressed spring?
   1.   Kinetic energy
   2.   Chemical energy
   3.   Elastic potential energy
   4.   Thermal energy
8. A 2 kg object is moving with a velocity of 3 m/s. What is its kinetic energy?
   1.   3 J
   2.   6 J
   3.   9 J
   4.   18 J
9. What is the potential energy of an object with a mass of 5 kg at a height of 10 meters (assuming g = 9.8 m/s²)?
   1.   50 J
   2.   48 J
   3.   490 J
   4.   980 J
10. Which of the following is an example of work being done?
    1.   Holding a heavy book steady
    2.   Pushing a car that doesn't move
    3.   Lifting a box onto a shelf
    4.   Sitting on a chair