Choose the right answer
When a ball rolled over a smooth surface and then over another .The force exerted on it is ____________
magnetic force
frictional force
gravitational force
muscular force
Which one of the following is correct?
Force can increase the growth of a body
Force can change the smell of a body
Force can change the size and shape of a body
All the above
In which of the following cases is friction a disadvantage to us ?
Running
Breaking
Writing with pencil
Parts of a machine rubbing with each other
Pick the odd one out
burning of firewood
light is produced when bulb glows
fire cracker explodes
burning of magnesium ribbon.
In a car ______________ energy is converted into __________ and ____________
Chemical energy into heat energy and electrical energy
Chemical energy into mechanical energy and electrical energy
Electrical energy into heat energy and mechanical energy
Chemical energy into heat energy and mechanical energy
Water stored in the over -head tank
Flowing water
Running vehicle
Rolling ball
