Work and Power

Work and Power

Post Test

Multiple Choice

In which situation is work NOT done?

• Kicking a ball

• Climbing a stair

• Sitting on a chair

• Flexing your arm with a barbell

Multiple Choice

A bagger is carrying the heavy luggage from the market to the terminal of jeep but according to the logic of physics his work done is said to be zero. Which of the following is the correct reason?

• The force is acting along the direction of displacement of luggage.

• The force is exerted perpendicular to the direction of displacement of luggage.

• The force is exerted opposite to the direction of displacement of luggage.

• None of the above.

Multiple Choice

Suppose you spend one hour pushing as hard as you can on a wall, but the wall doesn't move. How much work have you done?

• 600 J

• 100 J

• 60 J

• 0 J

Multiple Choice

Rodel does work in 20 second. Dan does the same work in 10 seconds. Which of the following statements is TRUE?

• Rodel has more power.

• Dan has more power.

• Dan has less power.

• Rodel and Dan have the same power.

Multiple Choice

Which of the following statements best describes "power"?

• How fast a work is done

• A way of transferring energy

• Force applied over distance moved

• Power of the force times distance moved