Force and Pressure Test

Result

Force and Pressure Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

The atmospheric pressure at 600 m above the sea level is

A
equal to the pressure at sea level

B
less than that at sea level

C
more than that at sea level

D
cannot be predicted definitely

Solution

Pressure falls with rising heights. So, at 600 m above the sea level the pressure will be lesser than that at the sea level.
Question 2
1 / -0

Use the following information to answer the next question.

A car moves with a constant speed toward East. A force is applied on the car to make it stop.

The direction of the applied force is toward

A
North

B
South

C
West

D
East

Solution

Here, the student is required to investigate the relationship between the direction of applied force and the motion of the car. Since the car moves toward East, the applied force that stops the car must be in the opposite direction. Hence, the direction of the applied force is toward West.

Why alternative A is wrong:

If the direction of the applied force is toward North, then the car will turn toward North.

Why alternative B is wrong:

If the direction of the applied force is toward South, then the car will turn toward South.

Why alternative D is wrong:

If the direction of the applied force is toward East, then the speed of the car will increase.
Question 3
1 / -0

Use the following information to answer the next question.

Four actions:

I When pressed, the water present in a rubber dropper rises.

II A nail is pushed into a wall.

III A postcard remains attached to an inverted glass of water.

IV When pressed, a rubber sucker gets attached to a wall.

Which of the following actions is not caused by atmospheric pressure?

A
I

B
II

C
III

D
IV

Solution

In the case of a nail being pushed into a wall, the area of contact is very small. Therefore, a huge pressure is required to push the nail into the wall. Atmospheric pressure can never be so high that it is able to push a nail into a wall. Therefore, atmospheric pressure does not play any role in action II.