Question

Match the following
column 1
1)Passengers fall forward as the bus stops
2)Passengers fall backwards as the bus starts
3)Passengers fall sideways as the bus turns
4)Applied force equals frictional force
5)Applied force is greater than force
Column 2
a) Inertia of direction
b) Inertia of rest
c) balanced force
d) Unbalanced force
e) Inertia of motion ​

Answer 1

Answer:

1) Passengers fall forward as the bus stops.

Ans e)Inertia of motion

Reason: The bus suddenly puts the brake while it is in motion. During this time, the passengers are also in motion. They tend to stay in motion but due to sudden brakes they fall forward.

2)Passengers fall backward as the bus starts.

Ans. b) Inertia of rest

Reason: The bus is at rest now. The passengers are also at rest. But when the bus starts to move, the passengers tend to stay at rest. That is why they fall backwards.

3)Passengers fall sideways as the bus turns

Ans a) Inertia of direction

Reason: Try to answer your own after understanding the first and second concepts.

4)Applied force equals frictional force

Ans. c) balanced force

Reason; when you try to push a heavy box on your own , the force you apply may be same as that of the force that the ground offers the box(frictional force). Hence the force is balanced and the box does not move.

5) Applied force is greater than force

Ans. d) Unbalanced force

Reason. The opposite concept to that of the previous question.