Tag: physics

Questions Related to physics

Inertia is __________ .

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

  1. a property of matter

  2. a type of force

  3. the speed of an object

  4. none of the above

Show answer
Correct Option: A
Explanation:

Inertia is a property of matter that offers the resistance to any change in its state of motion including changes to its speed and direction or the state of rest.

From the following 3 solids of the same shape and same volume which one has the highest inertia?

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

  1. Steel

  2. Wood

  3. Aluminium

  4. None of the above

Show answer
Correct Option: A
Explanation:

Steel has highest mass and highest density which means it has highest inertia.

Fill in the blank: 

Tendency of an object to _____ a change in its state of rest or motion is called inertia

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

  1. Allow

  2. Assist

  3. Resist

  4. None of these

Show answer
Correct Option: C
Explanation:

Due to inertia, objects resist any change in motion. 

Which law is referred to as the law of inertia?

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

  1. First law of motion

  2. Second law of motion

  3. Third law of motion

  4. None of these

Show answer
Correct Option: A
Explanation:

Newton's first law of motion is referred to as the law of inertia

Inertia means resistance to the change of state.

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

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

Inertia is defined as the property by virtue of it, body tends to continue its state of rest or of uniform motion.

So, given statement is true.

While dusting a carpet, we give a sudden jerk or beat with a stick because :

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

  1. Inertia of rest keeps the dust in its position and the dust is removed by movement of carpet away.

  2. Inertia of motion removes dust.

  3. No inertia involved in process.

  4. None of the above

Show answer
Correct Option: A
Explanation:

When carpet is given sudden jerk, due to inertia dust particles does not change position, while carpet moves.

Thus dust particles gets separated from carpet.
So, Option A is correct. 

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

physics dynamics - explaining motion concept of inertia galileo's law and inertia mass and inertia

  1. True

  2. False

Show answer
Correct Option: A
Explanation:

the statement is true and the reason is Newton's law of inertia or First law of motion. 

As body tends to be in its original state when the horse suddenly stops, the lower part of rider stops with it but upper part remains in motion. So, rider falls forward.

Which of the following has more inertia ___

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

  1. 5Rp coin and 2Rp coin

  2. 2Rp coin and 3Rp coin

  3. 10Kg iron

  4. None of these

Show answer
Correct Option: C
Explanation:
Inertia depends upon the mass of the body. If the mass is more, inertia is more and vice versa. 10kg iron has more mass than 5Rp coin and 2 Rp coin thus its inertia is also more.
So, the correct answer is '10kg iron'.

A water tanker filled up to $\dfrac {2}{3}$rd of its height is moving with a uniform speed. On sudden application of the brake, the water in the tank would

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

  1. move backward

  2. move forward

  3. be unaffected

  4. rise upwards

Show answer
Correct Option: B
Explanation:

Basically, the law of motion is that an object at rest stays at rest and an object continues in motion until an external force acts on it.
Inertia is the resistance of any physical object to any change in its state of motion, including changes to its speed and direction. It is the tendency of objects to keep moving in a straight line at constant velocity.


So, on sudden application of brakes on the water tank, the water tank decelerates or may even stop but the water in the tank still has a tendency to move forward due to inertia. Hence the water in the tank would move forward.
A water tanker filled up to two-thirds of its height moving with a uniform speed, on sudden application of the brake, the water in the tank would move forward.

If a train is retarding and at same time coin is thrown upwards, then you will observe that:

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

  1. the coin reaches again in your hand

  2. the coin falls behind you

  3. the coin falls in front of you

  4. the coin follows a circular path

Show answer
Correct Option: C
Explanation:

At t$=$0
Velocity of train$=$v
Velocity of coin$=$v(horizontal velocity in the direction of velocity of train)
at t$=$t
Velocity of train$=$v-$\Delta$ v
Velocity of coin$=$v
Distance travelled by train after retarding$=$(v-$\Delta$v)t
Distance travelled by coin$=$v$\times$t   which is greater than distance travelled by train.
So,the coin will fall infront of you.