Newton's 1st Law of Motion

Q.

Which of the following objects has the maximum inertia?

1. Car

2. Truck

3. Horse cart

4. Bullet

Q.

Mass measure the amount of _____ in a body.

1. inertia

2. motion

3. velocity

4. acceleration

Q.

Galileo concluded that an object moving on a frictionless horizontal surface should move with constant velocity.

1. True
2. False

Q.

When are the forces acting on a body said to be balanced? Give an example. What type of changes can balanced forces bring about in an object?

Q. When a car travelling at a high speed, takes a turn at a sharp bend, the people inside the car experience an outward pull. Why does this happen?

1. due to acceleration

2. due to change in momentum

3. due to Innertia of direction

4. due to change in velocity

Q.

To study the third law of motion, following sets of apparatus are available in a laboratory.
Set (i) One spring balance, two weight boxes, inextensible thread, one pulley with a clamp, two pans of known mass.
Set (ii) Two identical spring balances, one weight box, inextensible thread, one frictionless pulley with a clamp, one pan of known mass, a rigid support.
Set (iii) Four identical spring balances, two pulleys, inextensible thread, two clamps, two pans of known masses, two rigid support.
Set (iv) Two identical spring balances, two weight boxes, two rigid supports, two pans of known masses, inextensible thread, two frictionless pulleys with clamps.

To perform the experiment successfully by using minimum apparatus, the best choice would be :

1. Set(i)

2. Set(ii)

3. Set(iii)

4. Set(iv)

Q.

If a body is at rest, it means no force is acting on it

1. True

2. False

Q.
In which of the cases, the ball supposed to be in Equilibrium, if net force on ball in each case is zero. (Here we are only talking about translation equilibrium, not rotational)

1. Mountain
2. Plain
3. Valley
4. All

Q. Newton's first law qualitatively describes inertia.

1. True
2. False

Q. Choose the correct statement(s).

1. Unbalanced forces can change the direction of motion.
2. Balanced forces are required to accelerate the motion.
3. An object moves with a uniform velocity when there is no net force acting on it.
4. Balanced forces cannot bring an object at rest to motion.

Q. Inertia is defined only for objects at rest.

1. True
2. False

Q.

An object of mass 2 kg is sliding with a constant velocity of 4 m/s on a frictionless horizontal table. The force required to keep the object moving with the same velocity is

1. 32 N

2. 0 N

3. 2 N

4. 8 N

Q. Choose the correct option regarding inertia.

1. It is confined only to moving objects.
2. It is the tendency of an object to resist a change in its state of rest or motion.
3. It is confined only to objects at rest.
4. It depends on the speed of the object.

Q. Choose the correct option with respect to Newton's first law of motion among the following.

1. It is also called the law of gravitation.
2. An object at rest can move without any external force acting on it.
3. An object in motion stays in constant motion unless acted upon by an unbalanced force.
4. An object in motion may come to rest without any external force acting on it.

Q. If net force is zero, _____ is necessarily zero.

1. distance
2. velocity
3. acceleration
4. speed

Q. A person jumping out of a moving train tends to fall in the direction of the moving train. This is an example of inertia of motion.

1. True
2. False

Q. A moving body can continue moving on a frictionless surface only when a force is acting on it.

1. False
2. True

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

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