Basics

Q.

A body is moving in a circular motion of constant radius, then

1. The net acceleration of the body may be towards the centre of circle

2. The net acceleration of the body may not be towards the centre of circle

3. The velocity of the body is varying

4. The direction of the acceleration of the body is varying

Q.

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

1. Must come to rest.

2. Must be accelerated.

3. Must move with uniform velocity.

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.

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.

Towards which direction will the block move?

1. The block will move in the direction of force $F_1$

2. The block will not move, as the forces are balanced

3. The direction of motion cannot be determined

4. The block will move in the direction of force $F_2$

Q.

The acceleration of a particle ‘ X ‘ remains constant in magnitude but not in direction, which of the following path does particle ’ X’ can have?

1. Straight line

2. Circular path

3. Elliptical Path

4. Parabolic path

Q.

When no object is placed on the hook of a spring balance, the pointer reads

1. One

2. zero

3. ten

Q. A car is stationary on a road, it does not mean that no force is acting on it.

1. True
2. False

Q. Match the types of inertia possessed by passengers sitting in a bus corresponding to the state of bus.

1. Bus starts moving
2. Bus takes a turn
3. Bus comes to a rest

Q. A car starts from home and reaches its destination which is $20km$ away. It returns back to home taking a total time of $2hours$. The average velocity of the car is _____ $m{s}^{-1}$.

1. $10$
2. $30$
3. $0$
4. $20$

Q.

Two bodies of different masses $m_a$ and $m_b$ are dropped from two different heights $a$ and $b.$ The ratio of the time taken by the two to cover these distances are

1. $a:b$

2. $b:a$

3. $\sqrt{a}:\sqrt{b}$

4. $a^2:b^2$

Q. When a batsman hits the ball, the force applied on the ball changes its velocity.

1. False
2. True

Q. An object is moving in a straight line with uniform velocity. Which of the following statements can be inferred from this information?

1. It covers equal distances in equal interval of time.
2. It covers unequal distances in equal interval of time.
3. Acceleration is constant.
4. Acceleration is zero.

Q.

The rate of change of velocity is termed as _____.

1. average speed

2. acceleration

3. average velocity

4. force

Q.

If the velocity-time graph is a straight line parallel to time axis for a body, then the body is having _____.

1. non-uniform motion

2. non-uniform accelerated motion

3. uniform velocity motion

4. uniform accelerated motion

Q.

A boy is sitting on a merry-go-round which is moving with a constant speed. This means that the boy is _____.

1. moving with uniform velocity

2. at rest

3. moving with no acceleration

4. in accelerated motion

Q. A particle accelerates from rest at a constant rate for some time and attains a peak velocity of $8\text{m}{\text{s}}^{-1}$. Afterwards, it decelerates at the same rate and comes to rest. If the total time taken is 4 seconds, the total distance travelled is _____.

1. $32\text{m}$
2. $16\text{m}$
3. $4\text{m}$
4. $25\text{m}$

Q. Which object has more inertia and why? A moving car or a stationary ship?

1. The ship, because it has a greater volume than the car.
2. The ship, because it is not moving.
3. The ship, because it has more mass.
4. The car, because it is moving with some velocity.

Q. In a tug of war, two teams are pulling a rope, but still the rope is not moving either side. So the forces are:

1. Unbalanced forces
2. Balanced forces
3. Gravitational forces
4. Electrostatic forces