If we apply force on a moving object in the same direction, the speed of the object
decreases
remains the same
increases
increases or decreases
Which one of the following statements is NOT true?
Friction makes a moving object slow down and stop
Friction between two surfaces will make them hot
Friction also enables an object to stay in a stationary position
Friction decreases if roughness of an object increases
On the removal of heat energy from water we get
steam
vapours
ice
dew
The capacity to do work is called
force
energy
machine
movement
A goal keeper stopped a moving ball by applying force. What inference can you draw this example ?
The ball was slow
Force applied by goal keeper is more than the force with the ball was moving
Force can stop a moving object
The ball stopped due to frictional force
In the battery cell, the energy is stored in the form of
electrical energy
muscular energy
chemical energy
solar energy
Which one of the following energies can be replenished?
Solar energy
Wind energy
Water energy
All of the above
When we throw a ball into the air, it falls back. The force responsible for this is
muscular force
gravitational force
mechanical force
None of these
When a bomb explodes, it converts
heat energy to light and sound energy
chemical energy to heat, light and electrical energy
chemical energy to heat, light and sound energy
heat energy to electrical, sound and light energy
The force which pulls a body towards the earth is called
friction
gravity
tension
collision
