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Physics 9 Chapter 3 - Dynamics - 8
1.
Which parts of the body of passengers travelling in a bus tends to continue their motion, when the driver applies brakes quickly?
a) Right side parts
b) Left side parts
c) Lower parts
d) Upper parts
2.
When a bus takes a sharp turn, passengers fall in the.............?
a) Backward direction
b) Outward direction
c) Forward direction
d) Inward direction
3.
Due to which passengers fall in outward direction when bus takes a sharp turn?
a) Force
b) Electrostatics
c) Momentum
d) Inertia
4.
Which parts of the body of passengers travelling in a bus are in contact with the bus stopping, when the driver applies brakes quickly?
a) Left side parts
b) Right side parts
c) Lower parts
d) Upper parts
5.
The passengers standing in a bus fall forward when its driver applies brakes suddenly. Why?
a) Both b and c
b) Because left side parts of bodies are in contact with the bus stopping
c) Because lower parts of bodies are in contact with the bus stopping
d) Because upper parts of bodies tend to continue their motion
6.
A boy jumps out of a moving bus. There is a danger for him to fall...................?
a) Towards the moving bus
b) Opposite to the direction of motion
c) Away from the bus
d) In the direction of motion
7.
With which situation, the second law of motion deals?
a) When the bodies are moving with uniform speed
b) When the bodies are at rest
c) The reaction of bodies when a force acts on it
d) When a net force is acting on a body
8.
When a net force acts on a body, what is produced in the body?
a) Velocity
b) Speed
c) Momentum
d) Acceleration
9.
Which law of motion states that “When a net force acts on a body, it produces acceleration in the body in the direction of the net force”?
a) Newton’s second law of motion
b) Newton’s third law of motion
c) Newton’s first law of motion
d) Newton’s fourth law of motion
10.
The passengers standing in a bus fall ..........when its driver applies brakes suddenly?
a) Forward
b) Outward
c) Inward
d) Backward
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