8th Grade > Physics
FORCE AND PRESSURE MCQs
Total Questions : 56
| Page 3 of 6 pages
Answer: Option C. -> Strong nuclear force
:
C
There are four fundamental forces in nature: gravitational, electromagnetic, weak nuclear and strong nuclear force. Among these forces, strong nuclear force is the strongest while gravitational force is the weakest.
:
C
There are four fundamental forces in nature: gravitational, electromagnetic, weak nuclear and strong nuclear force. Among these forces, strong nuclear force is the strongest while gravitational force is the weakest.
Answer: Option C. -> A sharp knife has a smaller contact surface area and hence applies more pressure.
:
C
A sharp knife has a lesser contact surface area than a blunt one. Lesser the surface area, greater will be the pressure. So, a sharp knife applies a greater pressure when it is used for cutting.This is why a sharp knife cuts better than a blunt one.
:
C
A sharp knife has a lesser contact surface area than a blunt one. Lesser the surface area, greater will be the pressure. So, a sharp knife applies a greater pressure when it is used for cutting.This is why a sharp knife cuts better than a blunt one.
Answer: Option B. -> atmospheric pressure
:
B
Atmospheric pressureis defined as the pressure exerted by the weight of the atmosphere. A barometer can be used to measure atmospheric pressure.
:
B
Atmospheric pressureis defined as the pressure exerted by the weight of the atmosphere. A barometer can be used to measure atmospheric pressure.
Answer: Option B. -> Barometer
:
B
Barometersare instrumentsused to measure atmospheric pressure. A barometer is usedby meteorologists to forecast short-term changes in the weather. If the atmospheric pressurefalls, storms and rain can be expected.
:
B
Barometersare instrumentsused to measure atmospheric pressure. A barometer is usedby meteorologists to forecast short-term changes in the weather. If the atmospheric pressurefalls, storms and rain can be expected.
Answer: Option C. -> Gravitational force
:
C
Water droplets in clouds which eventually form rain have mass. Therefore, they are pulled towards the Earth by the gravitational force of Earth.
:
C
Water droplets in clouds which eventually form rain have mass. Therefore, they are pulled towards the Earth by the gravitational force of Earth.
Answer: Option A. -> True
:
A
Every object in the universethat has mass exerts a gravitational force on every other object having mass. Thus, the given statement is true.
:
A
Every object in the universethat has mass exerts a gravitational force on every other object having mass. Thus, the given statement is true.
Answer: Option B. ->
False
:
B
:
B
Here, the position of the car remains fixed with respect to time. This means that the car is at rest and there is no change in its state of motion. Hence, the net force on the car is zero and the given statement is false.
Answer: Option A. ->
True
:
A
:
A
The pressure exerted by the atmosphere is called atmospheric pressure. Inside the body, the flowing blood and body fluids create a pressure which counters the effect of atmospheric pressure. Therefore, we don't feel atmospheric pressure and are not crushed by it.
Answer: Option C. ->
Strong nuclear force
:
C
:
C
There are four fundamental forces in nature: gravitational, electromagnetic, weak nuclear and strong nuclear force. Among these forces, strong nuclear force is the strongest while gravitational force is the weakest.
Answer: Option B. ->
False
:
B
:
B
A contact forces requires physical contact between bodies for the force to act. Magnetic and electrostatic forces can be applied on a body without actually touching it. Thus, the given statement is false.
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