Test: Force & Pressure- 1 - UPSC MCQ

# Test: Force & Pressure- 1 - UPSC MCQ

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## 10 Questions MCQ Test Science & Technology for UPSC CSE - Test: Force & Pressure- 1

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Test: Force & Pressure- 1 - Question 1

### A push or pull on an object is called

Detailed Solution for Test: Force & Pressure- 1 - Question 1

A push or pull on an object is called force. Force can make stationary body in motion and moving body in rest.

Test: Force & Pressure- 1 - Question 2

### Which one of the following forces is a contact force?

Detailed Solution for Test: Force & Pressure- 1 - Question 2

Contact forces are those that result when the two interacting objects are perceived to be physically contacting each other.
Example: Frictional forces, tensional forces, normal forces, air resistance forces, and applied forces.

Test: Force & Pressure- 1 - Question 3

### S.I. unit of force is

Detailed Solution for Test: Force & Pressure- 1 - Question 3

S.I. unit of force is Newton.
One Newton is a force required to push a body of mass of one kg to a distance of one meter.

Test: Force & Pressure- 1 - Question 4

In game of tug-of war, two teams

Detailed Solution for Test: Force & Pressure- 1 - Question 4

In a game of tug-of war, two teams pull the rope in opposite direction. The team that pulls the rope toward itself will become winner.

Test: Force & Pressure- 1 - Question 5

Perpendicular force acting per unit area is called

Detailed Solution for Test: Force & Pressure- 1 - Question 5

The total force acting perpendicular on a given surface is called thrust. Thrust acting upon a unit area is called pressure.

Test: Force & Pressure- 1 - Question 6

A water tank has four taps fixed at points A, B, C, D as shown in Fig. 11.4. The water will flow out at the same pressure from taps at

Detailed Solution for Test: Force & Pressure- 1 - Question 6

In the given water tank, B and C are at the same levels. Hence, from taps B and C, water will flow out at the same pressure.

Test: Force & Pressure- 1 - Question 7

The net force on an object is __________ if the two forces acting on it in opposite directions are equal.

Detailed Solution for Test: Force & Pressure- 1 - Question 7

The force on an object is zero if the two forces acting on it in opposite directions are equal in magnitude. This kind of force is called balanced force.

Test: Force & Pressure- 1 - Question 8

The pressure which is exerted by air around us is known as

Detailed Solution for Test: Force & Pressure- 1 - Question 8

Atmospheric Pressure

• Atmospheric pressure is the force exerted by the weight of air above any given point on the Earth's surface.
• It is caused by the molecules in the air being pulled down by gravity towards the Earth's surface.
• At sea level, the average atmospheric pressure is about 14.7 pounds per square inch (psi) or 101.3 kilopascals (kPa).
• As altitude increases, atmospheric pressure decreases because there is less air above pushing down.
• Changes in atmospheric pressure can affect weather patterns and can have an impact on the human body, especially at high altitudes.

•
Test: Force & Pressure- 1 - Question 9

A force applied on an object may change its

Detailed Solution for Test: Force & Pressure- 1 - Question 9

A force applied on an object may change its speed.

If the force applied on the object is in the direction of its motion, the speed of the object increases.
If the force applied on the object is in the direction opposite to the direction of motion, the speed of the object decreases.

Test: Force & Pressure- 1 - Question 10

The force exerted by the earth to pull the object towards itself is called

Detailed Solution for Test: Force & Pressure- 1 - Question 10

Gravitational Force

- Gravitational force is the force exerted by the earth (or any other massive object) to pull objects towards itself.
- This force is responsible for keeping planets in orbit around the sun, objects on the surface of the earth, and many other phenomena in the universe.
- The strength of the gravitational force depends on the masses of the objects and the distance between them.
- It follows the law of gravitation formulated by Sir Isaac Newton, which states that the force of gravity is directly proportional to the product of the masses of the objects and inversely proportional to the square of the distance between them.
- Gravitational force is a fundamental force of nature and plays a crucial role in the functioning of the universe.

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