9 class work and energy

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1The formula to find the work done

• W = F+s
• W = F.s
• W = F-s
• W = F/s

2.If a force acting on a body causes no displacement, the work done

• -1
• 1
• 0
• Infinity

3.Objects in motion possess energy and can do work; this energy is called———————

• Solar energy
• Thermal energy
• Potential energy
• Kinetic Energy

4.The sum of kinetic energy and potential energy is ————-

• Mechanical energy
• Thermal energy
• Potential energy
• Kinetic Energy

5.. 1 kilowatt =

• 1 watt
• 10 watts
• 100 watts
• 1000 watts

6.The energy used in one hour at the rate of 1kW is known as ————-

• 10kWh
• 1kWh
• 1W
• 1kW/h

7.What are the various factors affecting kinetic energy?

• Mass
• Momentum
• Velocity
• All the above options

8.When two identical bodies are in motion, the body with a higher velocity has ————-

• Option 1Lower Kinetic Energy
• Higher Kinetic Energy
• No Kinetic Energy
• None of the options

9.. If the displacement is perpendicular to the force, then the work done is said to be—————.

• -1
• 1
• 0
• Infinity