Available Answers

1. 1.

   Multiple choice questions:

   1. A ball thrown upwards comes back to the ground because of ______________.
      1. frictional force
      2. gravitational force
      3. muscular force
   2. This force slows down a moving ball.
      1. Frictional force
      2. Gravitational force
      3. Muscular force
   3. To make work easy we use a ______________.
      1. sewing machine
      2. simple machine
      3. time machine
   4. This is used to cut things.
      1. Pulley
      2. Lever
      3. Wedge
   5. The interior of Earth is very ______________.
      1. cold
      2. hot
      3. none of these
2. 2.

   True-False:

   1. Force is the ability to do work.
   2. An apple falls on the ground due to gravitational force of the Earth.
   3. Simple machines make our work difficult.
   4. To use the energy of water, we build dams.
3. 3.

   Fill in the blanks:

   1. __________________ force acts between two surface.
   2. Bottle opener is an example of __________________.
   3. A __________________ is used to take out water from a well.
   4. Solar cells convert __________________ energy into __________________ energy.
   5. __________________ energy is the energy of the Earth's  hot interior.
4. 4.

   Match column A with column B:

   Column A	Column B
   1. machine to draw water on a well	a. Wedge
   2. Bicycle	b. Inclined Plane
   3. Scissors	c. Pulley
   4. Slide	d. Wheel and axle
   5. Axe	e. lever

    

5. 5.

   Find the odd one:

   1. Pulling a door, lifting a bag, falling of an apple
   2. Solar energy, frictional force, hydro energy
   3. Axe, bottle opener, scissors
   4. Bicycle, axe, knife
6. 6.

   What is force? What are its different types?