Available Answers

1. 1.

   Application of force can result in the several outcomes. In the pictures given below identify what is happening after application of force.

   

2. 2.

   Fill in the blanks with the help of given words:

   (geothermal energy, simple machines, inclined plane, energy, muscular force, force)

   1. _____________ can change the direction of a moving object.
   2. The force exerted by our muscles is called _____________.
   3. Machines like needle, knife, scissor, opener, etc. are _____________.
   4. _____________ is a slope that connects the lower surface with upper surface.
   5. The ability to do work is called the _____________.
   6. The heat stored inside the Earth is called _____________.
3. 3.

   Choose and write the correct option:

   1. Force can _____________ a moving object.
      1. move
      2. stop
      3. none of these
   2. The force that pulls an object towards the centre of the earth is _____________.
      1. frictional force
      2. gravitational force
      3. mechanical force
   3. _____________ is a long rod that rests on a support which lifts or moves loads.
      1. Screw
      2. Pulley
      3. Lever
   4. Which of the following is an example of an inclined plane?
      1. Ramp
      2. Scissors
      3. Lid
   5. The _____________ is the main source of energy on Earth.
      1. water
      2. air
      3. sun
   6. _____________ is used in cooking.
      1. Petrol
      2. Diesel
      3. Coal
4. 4.

   Match the following:

   1. bulldozer	a. lever
   2. see-saw	b. inclined plane
   3. door knob	c. wedge
   4. escalator	d. complex machine
   5. axe	e. screw
   6. fountain pen	f. wheel and axle

    

5. 5.

   How does force help us?
6. 6.

   What is gravitational force?