Free Force, Work and Energy 01 Practice Test - 4th Grade
Question 1
If a ball is thrown up, after reaching a particular height it will come back due to:
Force of gravity
Magnetic force
Frictional force
Normal force
SOLUTION
Solution : A
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 2
What are the two main types of forces?
Melting, Solid
Warm, Cold
Spring, Flow
Contact, Non-Contact
SOLUTION
Solution : D
The two main types of forces are contact and non-contact forces.
Question 3
What would happen if there were no gravity on earth?
Everything would sink into the ocean.
An object would never return if thrown up.
We won't be able to throw any object.
SOLUTION
Solution : B
The gravitational force of Earth keeps everything binded on the surface. If we throw any object in the absence of gravity, it would fly-off forever.
Question 4
The force of gravity pushes objects away from the centre of the Earth.
True
False
SOLUTION
Solution : B
The force of gravity pulls objects towards the centre of the Earth.
Question 5
A magnet attracting iron pins is an example of ______.
gravitational force
magnetic force
metallic force
upward pull
SOLUTION
Solution : B
A magnet attracting iron pins is an example of magnetic force.
Question 6
A moving ball on the ground comes to a stop after some time because of
speed
friction
motion
magnetism
SOLUTION
Solution : B
Friction always acts opposite to the motion. Hence, a moving ball on the ground comes to a stop after some time because of friction.
Question 7
A ball is kept on an inclined plane. The ball is not moving due to:
magnetic force
electrostatic force
gravity
friction
SOLUTION
Solution : D
The ball is not moving and remains motionless due to the force of friction as friction opposes the motion.
Question 8
When a force causes displacement of an object,
gravity
speed
energy
work
SOLUTION
Solution : D
Work is said to be done when a force applied on an object moves that object. Work is calculated by multiplying the force applied on the object to the movement or displacement of the object.
Question 9
The capacity to do work is called ____.
motion
energy
speed
distance
SOLUTION
Solution : B
Energy is the capacity to work.
Question 10
Force is defined as a ___ or ____ that can cause an object to move, remain in place or change its shape.
attraction, repulsion
push, pull
squeeze, pull
spring, break
SOLUTION
Solution : B
A force is defined as a push or pull that can cause an object to move, remain in place or change its shape.