Force & Pressure- 2 - Free MCQ Practice Test with solutions, UPSC Sci Tech

When a force is applied on an object in the same direction as its motion, it results in an increase in speed.

Conversely, if a force is applied in the opposite direction, it causes a decrease in speed.

• Forces acting in the same direction add together.
• Forces acting in opposite directions subtract from one another.
• The net force determines the overall effect on the object's motion.

Force is a vector quantity as it contains both direction and magnitude but strength of a force is usually expressed by its magnitude.

Answer:
The correct answer is gravitational force. Here is a detailed explanation:
Gravity and Falling Objects:
- When leaves or fruits fall from trees, they are pulled towards the ground by the force of gravity.
- Gravity is the force that attracts objects towards each other, and it is a fundamental force of nature.
- The Earth has a large mass, which creates a gravitational field around it.
- Any object near the Earth's surface is pulled towards the center of the Earth by this gravitational field.

When force is applied to any object it may change its direction eg.foot ball it may change its shape eg dough it may change its state it may change its motion.

Muscular force enables us to perform all activities involving movement or bending of our body. Muscular force is developed inside muscle due to presence of contractile protein.

When two forces act in opposite directions, the net force is found by subtracting the smaller force from the larger one. The direction of the net force will be in the direction of the larger force. If both forces were acting in the same direction, you would add them. Therefore, the net force is the difference between the two forces when they act in opposite directions.

The forces in which to bodies acting on each other are in contact are called contact force. Muscular force is an example of contact force.

The force resulting due to the action of muscles is known as the muscular force. Muscular force is present in all animals including human beings.

Force is defined as a push or pull that can change the state of motion of an object. It can cause an object at rest to move, or an object in motion to stop or change direction. The force is responsible for altering the velocity or the motion of an object.
Therefore,Correct Answer- Option B

Electrostatic force is exerted by charged body on another charged body or uncharged body. Two charged body having same kind of charge repels each other.

Like poles of magnet repels each other while unlike poles of two magnet attract each other.

Friction arises due to contact between two surfaces. Friction force is more in case of solid body and less in case of gases.

A force has both magnitude and direction so, force is a vector quantity. Force can change state and shape of body.

Gravitational force is a universal force. It acts on all objects that have mass, whether they are on Earth, the Moon, other planets, or even far away in space.
For example:

• Earth pulls objects towards it (this is why things fall).

• The Moon's gravity causes ocean tides on Earth.

• Planets revolve around the Sun because of gravitational force.

So, gravitational force acts on all bodies in the universe.

Force applied on inflated balloon is an example that shows that force can change shape and size of object.

The speed of moving ball increase further if force is applied in direction of motion and decrease if force is applied in opposite direction.

The force exerted by a charged body on another charged or uncharged body is known as electrostatic force. Electrostatic force is non-contact force.

The tendency of a body to maintain its state of rest or uniform motion is called inertia. Mass is the measure of inertia.

Gravitational force is one of the most fundamental forces of nature. It causes objects to attract each other . It is a conservative type of force . The gravitational force is independent of the intervening medium.It is one of the weakest force of the nature.

When a force is applied to a body, it can change the body's state of motion. If the force is applied in the direction of the body's motion, it causes the body to accelerate, meaning the speed of the body increases. This is in accordance with Newton's second law of motion, which states that force equals mass times acceleration (F=ma). Thus, the application of force in the direction of motion leads to acceleration.