Law of Motion MCQ question and answer with solution | Physics Gk MCQs

Assertion (A) A body having non-zero acceleration can have a constant velocity.
Reason (R) Acceleration is the rate of change of velocity.

A wheel-barrow is an example of

Applying a force of 5 newtons on a wooden plank with mass m₁ kg, it accelerates with an acceleration of 10 ms^-2. Another plank of mass m₂ kg accelerates with an acceleration of 20 ms^-2 when the same force is applied. If both the planks are tied with each other and the same force is applied on them, what will be the acceleration?

A car starts from Bengaluru, goes 50 km in a straight line towards South, immediately turns around and returns to Bengaluru. The time taken for this round trip is 2h. The magnitude of the average velocity of the car for this round trip

A ball balanced on a vertical rod is an example of

According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the . . . . . . . . of an object.

A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is/are true?
1. The ball moves with constant velocity.
2. The ball moves with constant speed.
3. The ball moves with constant acceleration.
4. The magnitude of the acceleration of the ball is constant.
Select the correct answer:

In a vacuum, a five-rupee coin a, feather of sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t₁, t₂ and t₃, respectively. In this situation, we will observe that

Force/mass = . . . . . . . .

A man weighing 70 kg is coming down in lift. It the cable of the lift breaks sudden, the weight of the man would become