Class VIII

The force involved in falling an apple from a tree is:
  1. Magnetic force
  2. Contact force
  3. Electrostatic force
  4. Gravitational force
Force acts on an object may change
  1. direction
  2. shape
  3. speed
  4. all of the above
A body is said to be under balanced forces when the resultant force applied on that body is_____
  1. One
  2. Zero
  3. Infinite
  4. None of these
Opening a door is an example of ._______
  1. Contact force
  2. Non contact force
  3. Spring force
  4. Magnetic force
The ratio of force, acting perpendicular to the area, on which it acts is known as ________.
  1. Force
  2. Friction
  3. Presuure
  4. Density
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