Work done by constant force

What is false about energy?

• when energy is transferred, work is done

• 
  gravitational force is an energy

• energy is the ability to do work

• energy cannot be created or destroyed but transferred from one form to another

What is the SI unit of energy and work done?

• 
  Newton (N)

• Joule (J)

• Kilogram (Kg)

• Pascal (Pa)

What is the formula to calculate amount of work done?

• 
  Work done = Force ÷ Area

• Work done = Mass x Gravitational Field Strength

• Work done = Force x Distance

• 
  Work done = Force ÷ Distance

Work is not done by the man because the wall is not ................

Work is not done by the man because he is not applying any ............. on any object.

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 
  120 J

• 
  120 N

• 30 J

• 
  30 N

Two people shove on a wall with 100 N. The wall doesn’t move. How much work is done?

• 
  100J

• 
  0J

• 100N

• 0N

Ahmed is out with his friends. Misfortune occurs and Ahmed and his friends find themselves getting a workout. They apply a cumulative force of 1000 N to push the car 200 m out of the sand. Determine the work done on the car.

• 
  2 x 10⁵ J

• 3.2 x 10^-4 J

• 2.70 x 10⁴ J

• 
  3.54 x 10⁵ J

A child pulls a balloon for 12 m with a force of 1N at an angle of 60 degrees.  How much work does the child do on the balloon?

• 
  -10J

• 
  6J

• 
  -6J

• 
  12J