Tag: physics

Quizzes (598) Questions (13441)

Questions Related to physics

Multiple choice physics kinematics motion around us motion and rest moving things around us

Electric drill, rolling ball, wheel of a moving car, pendulum of a wall clock,spinning ball. Find the odd one out.

  1. pendulum of a wall clock

  2. <span>Electric drill</span>

  3. <span>wheel of a moving car</span>

  4. <span>spinning ball</span>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pendulum of a wall clock- It is in periodic motion. Rest all are in multiple motion. The restoring force is proportional to displacement .While electric drill, rolling ball etc are in multiple motion like rotational +transnational or Vibrational motion.

Multiple choice physics kinematics motion around us motion and rest moving things around us

Apple falling from a tree, car moving on a straight road, coins moving over a carrom board, giant wheel. Find the odd one out:

  1. gaint wheel

  2. <span>Apple falling from a tree</span>

  3. <span>&nbsp;car moving on a straight road</span>

  4. <span>coins moving over a carrom board</span>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Giant wheel- because it has rotational motion as well as transnational motion. While apple falling from a tree, a car moving on straight rod and coin moving over a carrom board have only linear or rectilinear motion.  

Multiple choice physics kinematics motion around us motion and rest moving things around us

Find the odd one out.
Table, chair, tree, moon

  1. moon

  2. chair&nbsp;

  3. tree

  4. table
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Moon 

When the position of a body does not change with respect its surroundings and time the body is said to be in rest.
But moon is in motion with respect to earth while other object like book ,table and tree are in rest with respect to earth . When these object are viewed from other planet ,then they will appear moving with earth velocity.  

Multiple choice physics kinematics motion around us motion and rest moving things around us

Select the odd one :

Bouncing ball, spinning top, oscillating pendulum, study table

  1. study table

  2. <span>bouncing ball</span>

  3. <span>spinning top</span>

  4. <span>oscillating pendulum</span>
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

All the three object are in any osscilatory motion wrt to earth as frame of refrence. But study table is at rest.

So study table is odd one out of the four objects.

Multiple choice physics kinematics motion around us motion and rest moving things around us

Two balls of different masses have the same KE. Then the: 

  1. Heavier ball has greater momentum than the lighter ball.

  2. Lighter Will has greater momentum than the heavier ball.

  3. Both bans have equal momentum.

  4. Both balls have zero momentum.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The relation between kinetic energy $(K)$ and momentum $(p)$ is given by, $K=\dfrac{p^2}{2m}$ where $m$ be the mass of the body

So, $p=\sqrt{2mK}$
As kinetic energy is constant, so $p\propto \sqrt m$
Thus, the heavier ball has more momentum than that of lighter ball. 

Multiple choice physics kinematics motion around us motion and rest moving things around us

When a body is at rest, it is obeying

  1. Principle of conservation of energy

  2. Principle of moments

  3. Newton's first law

  4. Newton's second law
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Inertia is the tendency of an object to remain at rest or in motion. Newton's First Law of Motion states that an object will remain at rest or move at a constant speed in a straight line unless it is acted on by an unbalanced force.
So, when a body is at rest, it is obeying Newton's first law or motion or law of inertia. 
Multiple choice physics along with motion motion around us motion and rest moving things around us

What is corrct statement about impulse?

  1. change in velocity

  2. change in momentum due to force in small time

  3. change in acceleration

  4. change in speed
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Impulse:- It is defined as a change in momentum due to force in small time.

Mathematically, 
From Newton's law,
$F=\dfrac{\Delta p}{\Delta t}$
Impulse, $I=F\times \Delta t=\Delta P$
The correct option is B.

Multiple choice physics along with motion motion around us motion and rest moving things around us

A train of length 200 m traveling at $30 { ms }^{ -1 }$ overtakes another train of length 300 m traveling at $20 { ms }^{ -1 }$. The time taken by the first train to pass the second is 

  1. 10 s

  2. 30 s

  3. 40 s

  4. 50 s
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The relative speed of the first train with respect to the second is 30 - 20 = 10 m/s. The total distance to be covered to overtake is the sum of the lengths of both trains: 200 + 300 = 500 m. Time = Distance / Relative Speed = 500 / 10 = 50 s.