Work is said to be done when __________ produces displacement of a body.
force
energy
distance
speed
In the battery cell, the energy is stored in the form of
electrical energy
muscular energy
chemical energy
solar energy
Radha pushed a wall but failed to move it then
energy is not spent but work is done
energy is spent but work is not done
energy is not spent and work is not done
energy is spent and work is done
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
Which energy conversion takes place during photosynthesis?
Heat energy to Light energy
Light energy to Heat energy
Light energy to Chemical energy
Heat energy to Chemical energy
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
While playing football, the ball is passed from player to player at different speeds. It is possible because of
players expertise
the ground
gravitational pull
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
A football kicked by a boy rolls on the ground to some distance and stops. The force which stops the ball is
muscular force
gravitational force
mechanical force
frictional force
Which one of the following cannot be done by using muscular force?
Changing the direction of a moving body
Stopping a moving body
Changing or decreasing the speed of a body
Increasing or decreasing the speed of a body
