Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 1

MEDIUM

9th CBSE

IMPORTANT

Earn 100

Calculate the pressure when a force of $200 N$ acts on an area of $(i) 10 m^{2}$ , $(ii) 5 m^{2}$ .

Important Questions on Gravitation

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 2

What force acting on an area of

0.5 m^{2}

will produce a pressure of

500 P a

?

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 3

A force of

15 N

is uniformly distributed over an area of

150 c m^{2}

. Find the pressure in Pascal.

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 4

A force of

16 N

is applied on one surface of a cube of edge

8 c m

. Find the pressure on this surface.

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 5

Find the greatest and the least pressure exerted by a metal block of size

20 cm x 8 cm x 5 cm

having a mass of

5 kg - wt .

(

g = 10 m / s^{2}

)

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 6

A car weighs

1200 k g .

This weight is evenly distributed on

4

wheels. If the pressure in each tyre is

15 k g - w t / c m^{2}

, what is the area of each tyre in contact?

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 7

A nail is driven into a wooden block by using a hammer. The impact of the hammer on the head of nail produces a thrust of

25 N

. If the area of the head is

0.5 m m^{2}

and of the tip

0.1 m m^{2}

, find the pressures on the head and the tip of the nail.

MEDIUM

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 8

A boy weighing

60 k g

is wearing shoes with heel area of cross-section

20 c m^{2}

while a girl weighing

45 k g

is wearing shoes with heel of area of cross-section

1.5 c m^{2}

. Compare the pressure exerted on ground by their heels when they stand on the heel of one foot.

EASY

9th CBSE

IMPORTANT

Physics For Class 9>Chapter 3 - Gravitation>Exercise>Q 9

A hydraulic automobile lift is designed to lift cars with a maximum mass of

3000 k g - w t

. The area of the piston carrying the load is

425 c m^{2}

. Find the maximum pressure which the smaller piston have to bear? (

g = 10 m / s^{2}

)