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| Name:_________________________ | Date:_______________ | |
 
Forces | ||
A.
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Write the number of the correct answer in the brackets.
B.
1.
When a force is applied to a moving object and in the same direction as the moving
object, the object will ________.
( 
)
(1)
(2)
(3)
(4)
stop
move faster
move slower
change its direction
2.
It is tiring to climb up a flight of stairs because ________.
( )
(1)
(2)
(3)
(4)
of atmospheric pressure
of friction forces
the steps are too wide
it is against the direction of gravity
3.
The strength of a magnet will decrease when it is ________.
( )
(1)
(2)
(3)
(4)
placed under the sun for a long time
properly stored
not being used regularly
kept in a cool place
4.
Ball bearings are being used in many machines because they help to ________.
( )
(1)
(2)
(3)
(4)
reduce heat and noise
magnetise the machines
increase friction
slow down the motion of machine parts
5.
When a weight is hung at one end of a spring, the spring ________.
( )
(1)
(2)
(3)
(4)
compresses
becomes crooked
extends
causes the weight to become lighter
Write "T" for true and "F" for false.
C.
1.
When a ball is rolling down a slope, no work is done.
( )
2.
The unit of weight is kilometre.
( )
3.
The strength of a natural magnet cannot be increased by any means.
( )
4.
The greater the force, the lesser the energy required.
( )
5.
Wax can be used as a lubricant to reduce friction.
( )
Fill in the blanks with the most suitable word.
1.
There are different types of motion. The rotating blades of an electric fan is best
described as ____________ motion.
2.
A car does work by carrying people from one place to another. The car gets its energy
from the burning of ____________.
3.
The strength of a magnet is strongest at its ____________.
4.
The spring balance is a ____________ machine.
5.
The gravitational pull on the moon is ____________ than that on the Earth.