Force And Simple Machines(5th Grade > Science ) Questions and answers for exam Preparation

5th Grade > Science

FORCE AND SIMPLE MACHINES MCQs

Total Questions : 36 | Page 2 of 4 pages

Question 11. A screw is ___ wrapped around a cylinder.

a lever
a pulley
an inclined plane
a screw

Discuss Question

Answer: Option C. -> an inclined plane
:
C
The grooves on a screw are basically an inclined plane wrapped around the plain cylinder. The grooves act as a force multiplier.

A Screw Is ___ Wrapped Around A Cylinder.

Question 12. If a ball is thrown up, after reaching a particular height it will come back due to:

Magnetic force
Force of gravity
Frictional force
Normal force

Discuss Question

Answer: Option B. -> Force of gravity
:
B
Due to the gravitational force of Earth, every object is attracted towards the earth. Therefore the ball will be attracted towards the centre of the earth, so it will come back.If there was no gravity on Earth then the ball if thrown up, will never come back.

Question 13. An aeroplane can fly in the sky because the gravitional force does not pull it towards the centre of the earth.

True
False
Iron and Steel
Plastic and wood

Discuss Question

Answer: Option B. -> False
:
B
Gravitational force is a universal force. Every object in the universe attracts every other object in the universe gravitationally. Therefore gravitational force does pull the aeroplane towards the centre of the earth, but the force exerted by the engine of the plane makes itfly in the air.

Question 14. Which of the following objects will be attracted by a magnet?

Dust and sand
Paper and nylon
Iron and Steel
Plastic and wood

Discuss Question

Answer: Option C. -> Iron and Steel
:
C
Magnets attract some metallic objects like iron and steel. They do not attract non-metallic objects like plastic,wood or sand.

Which Of The Following Objects Will Be Attracted By A Magnet...

Question 15. The south and north poles of two magnets will attract each other.

True
False
Increase the length of load arm
Decrease the length of the load arm

Discuss Question

Answer: Option A. -> True
:
A
Like poles of magnets always repel each other and unlike poles attract. Thus, the north and south poles of two magnets will attract each other.

Question 16. When two objects rub against each other which force is acting on both the objects?

Magnetic
Friction
Gravitation
Non-contact

Discuss Question

Answer: Option B. -> Friction
:
B
When two objects rub against each other, the force of resistance is felt. This is calledfrictional force or friction. It is a contact force.

Question 17.

A freely suspended magnet points in which direction?

East-West
North-West
North-South
East-South

Discuss Question

Answer: Option C. -> North-South
:
C

A freely suspended magnet always points in the North-South direction. The earth is considered as a giant magnet. The north pole of the magnet points to the geographical south pole and vice-versa.

Question 18.

When two objects rub against each other which force is acting on both the objects?