Tag: force and newton's laws of motion

Quizzes (10) Questions (223)

Questions Related to force and newton's laws of motion

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

When a running horse suddenly stops, the rider falls  _________.

  1. forwards

  2. backwards

  3. to his right

  4. to the horse's right
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When horse stop suddenly rider falls due to inertia as when the horse is in motion rider also is in motion and when horse stop suddenly there is no external force acting on the ride to stop its motion therefore  rider falls forward.

Multiple choice physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

A coin tossed vertically by a passenger sitting in a train that is moving with a uniform velocity, still returns to his palm. This demonstrates the principle of.

  1. Inertia(Newton's First Law of Motion)

  2. Conservation of angular momentum

  3. Addition of velocities of the train and the coin

  4. Addition of forces due to gravity and the toss of the coin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A coin tossed vertically by a passenger sitting in a train that is moving with a uniform velocity, still returns to his palm, it happens due to the phenomenon of inertia as the person and coin in his hand both are in uniform motion with the train.

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.