Tag: momentum and newton's laws

Quizzes (0) Questions (58)

Questions Related to momentum and newton's laws

Multiple choice physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

Mark the correct option

  1. The state of motion of an object is described by its speed only

  2. Many a time application of force does not result in a change in the state of motion of an object

  3. By sitting on a bicycle seat force is applied to the spring fixed to the seat of a bicycle

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
$(i)$ option $A$ is correct, as if to know about the unifomity of a motion and the body is moving or not speed is used as the parameter
$(ii)$Option B is correct, as the acceleration of a body depends on the net force a applied not on single $10r$ individual forces.
$(iii)$ Option $C$ is correct, while sifting on the bicycle, the spring force allached to the seat balances weight.
Option $D$ 

Multiple choice physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

Newton's law of motion cannot be applicable to the particle moving at a speed comparable to the speed of

  1. $Light$

  2. $Sound$

  3. $Rocket$

  4. $Bullet train$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Newton's law of motion are applicable for matter which occupy some space and have some mass. It is not possible for any matter to travel with speed of light. Secondly the mass charges as the speed approaches speed of light. Newton's law is applicable only when mass is constant so light is correct option.

Multiple choice physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

Choose the correct statement(s)

  1. Motion necessarily takes place along the direction of force

  2. If no force acts, the body is at rest

  3. A body in motion, need not be acted upon by a force

  4. A change in speed is always there, whenever a force is applied on the moving body
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Motion always takes place along velocity of the body.So it does not necessarily takes place along the direction of force.
When a body moves with uniform velocity , there is no force acting on the body. So option B is incorrect and C is correct.
We know that magnetic force does not do work. It can change the direction of motion but never change the speed. So option D is incorrect.

Multiple choice physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

Hair of shaving brush cling together when it is removed from water due to

  1. Force of attraction between hair

  2. Surface tension

  3. Viscosity of water

  4. Charactersitic property of hair
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When the brush is taken out of water, the hairs cling together due to surface tension. This happens because the free surface of water tries to acquire a minimum surface area.

Hence, option B is correct.

Multiple choice physics force and newton's laws of motion first law of motion newton's first law of motion momentum and newton's laws

A ball moving on a table top eventually stops. What is the reason ?

  1. due to gravity.

  2. due to friction between the ball and table

  3. due to other external force.

  4. none of these.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Due to the force of friction between the ball and table top, it  opposes the motion of the ball. And, gradually its speed keeps on decreasing and the ball finally stops.