Available Answers

1. 1.

   Name the type of force.

   1. Rubbing your hands.
   2. A ball falling in ground.
   3. A pen to write any words on the paper.
   4. A pen that rolls off your desk to fall onto the floor.
2. 2.

   Identify if work is done or not.

   1. Madhulika is cleaning with a broom.
   2. Rajat is pushing a car. The car did not move.
   3. Maria is hitting shuttlecock with badminton.
   4. Afzar is sitting on a chair.
3. 3.

   Fill in the blanks.

   1. A __________ can raise weight or it can press or fasten objects.
   2. A __________ is a machine made up of a wheel and a rope.
   3. __________ is the ability or the capacity to do work.
   4. Sun's energy is also called as __________.
   5. Our body changes chemical energy from food into __________ energy.
4. 4.

   Tick (√) the correct answer.

   1. Force can
      1. move a stationary object
      2. stop a moving object
      3. change the direction and speed of the moving object
      4. all of the above
   2. The force which acts in opposite direction and slows or stops a moving object is
      1. frictional force
      2. gravitational force
      3. both of these
      4. none of these
   3. Work is said to be done when a 
      1. boy tries to move a wall
      2. boy walks towards his room
      3. boy sleeps
      4. boy thinks
   4. The main source of energy on this earth is 
      1. water
      2. sun
      3. heat
      4. wind
   5. Lever is a 
      1. simple machine
      2. force
      3. work
      4. energy
5. 5.

   State true or false.

   1. Force will only exist when two bodies interact with each other.
   2. The rod is the resting or balancing point upon which the lever turns.
   3. A battery or a cell has atomic energy stored in it.
   4. A wedge is a flat surface that is higher on one end.
6. 6.

   Give one word for the following.

   1. Sun's energy.
   2. Push or pull upon an object.
   3. A kind of lever that moves objects across distances.
   4. An inclined plane where the pointed edges are used to do some kind of work.
   5. The heat from the earth.