Available Answers

1. 1.

   Multiple Choice Questions.

   1. _____________ energy is used to run turbines.
      1. Wind
      2. Water
      3. None
   2. _____________ energy is used by green plants to prepare food.
      1. Water
      2. Solar
      3. Womd
   3. A ball come down due to _________________.
      1. energy
      2. friction
      3. gravity
   4. ____________ used wind energy.
      1. Plants
      2. Dams
      3. Windmills
   5. ____________ force slows down motion.
      1. Friction
      2. Gravitional
      3. None
2. 2.

   Write T for the true statement and F for the false one.

   1. Gravity pulls the object downwards.
   2. We need not energy to do work.
   3. A wedge is used to cut wood.
   4. Wind energy moves turbines.
   5. Wheel and axle is used in sailboats.
3. 3.

   Give two examples for each of the followings.

   1. Types of force
   2. Forms of energy 
   3. Types of simple machine
   4. Sources of energy
4. 4.

   Define force.

5. 5.

   What are the two types of force?

6. 6.

   Define gravity.