Balanced and Unbalanced Forces

Q. Given in the figure are three cases with the directions and magnitudes of forces indicated accordingly. Which of the three boxes is experiencing balanced force?

1. Box (ii)
2. Box (iii)
3. Both the boxes (i) and (ii)
4. Box (i)

Q. In the above figure, the arrows indicate the direction of forces $F_1$ and $F_2$ and the magnitudes of the respective force are given above the arrows. Initially the block is at rest. Towards which direction will the block move?

1. The block will move towards the direction of $F_1$ force.
2. The block will move towards the direction of force $F_2$.
3. The block will not move as the forces are balanced.
4. The direction of motion cannot be determined.

Q. If the net force on an object in uniform motion is zero, the object will _____.

1. accelerate uniformly
2. come to rest
3. accelerate non-uniformly
4. remains in its state of motion (rest or moving with constant velocity)

Q.

When an object is slided on a flat rough surface, it is difficult to attain a uniform motion primarily because of ____.

1. friction
2. gravitation
3. pressure
4. inertia

Q.

When the resultant forces acting on an object is not zero, the forces are:

1. Balanced forces
2. None of these
3. Unbalanced forces
4. Rare forces

Q.

The resultant of balanced forces acting on an object is always _____.

1. Non-zero
2. Equal to acceleration
3. Unity
4. Zero

Q.

An unbalanced force acts in the direction of motion of a body. Then the body:

1. Must come to rest.

2. Must move with uniform velocity.

3. Must be accelerated.

4. Must move along a circle.

Q. If the resultant of all the forces acting on a body is , the forces are called balanced forces.

1. unity
2. zero
3. infinite

Q. Match the direction of movement of block initially at rest according to the net applied force.

1. Moves towards A
2. Moves towards B
3. Remains constant

Q.

Jaikishan and Arun are pushing each other as shown in the given figure. Jaikishan’s push is weaker than that of Arun. As a result, they move in the direction shown in the figure.

Jaikishan and Arun move in the given direction because of:

1. Unbalanced force

2. Gravitational force

3. Balanced force

4. Tension force