Tag: force and newton's laws of motion

Questions Related to force and newton's laws of motion

The inertial force acts in a 

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

  1. Opposite direction to that of acceleration force

  2. Same direction as that of accelerating force

  3. Perpendicular direction to that accelerating force

  4. None of the above

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Correct Option: A
Explanation:

The concept of Inertial force is mainly used as a pseudo force in case of accelerating frames of reference.

The inertial force hence will act in a direction opposite to the direction of acceleration of the frame of reference.

The mass of object A is 5 kg,that of object B is 40 kg,that of object C is 38 kg,and that of object D is 56 kg. Which object has the greatest inertia?

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

  1. A

  2. B

  3. C

  4. D

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Correct Option: D
Explanation:

The object having the greatest mass has the greatest inertia because more force is required to change the initial state of the object.

Thus object D has the greatest inertia.

Inertia of a body has direct dependence on:

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

  1. velocity

  2. mass

  3. area

  4. volume

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Correct Option: B
Explanation:

Inertia has direct dependence on mass.

Inertia depends solely on mass and more the inertia more will be the mass or vice versa.

A and B are two objects with mass 6 kg and 34 kg respectively. Then,

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

  1. A has more inertia than B

  2. B has more inertia than A

  3. A and B both have same inertia

  4. None of the above statements is true

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Correct Option: B
Explanation:

Mass of body is translation inertia. So, more mass means more inertia. (heavier body difficult to move)

So, option B is correct.

P and Q are two objects with masses 5 kg and 30 kg respectively. Then,

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

  1. P has more inertia than Q

  2. Q has more inertia than P

  3. P and Q have the same inertia

  4. Neither P nor Q has any inertia

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Correct Option: B
Explanation:

Mass is a translation inertia of body.

More mass means more inertia.
So, $ Q$ has more inertia than $P$.
Option B is correct.

Passengers standing in a bus are thrown outwards when the bus takes a sudden turn, Because of:

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

  1. Outward pull on them

  2. Inertia

  3. Change in momentum

  4. Change in acceleration

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Correct Option: B
Explanation:

It’s because of inertia, which is simply the tendency of any body to continue on whatever path it’s travelling unless acted on by an external force. For a standing passenger, his/her body will tend to continue along the straight line route the bus was travelling before the sharp turn. As the passenger’s feet are fairly firmly located to the floor of the bus when it turns, a force will act upon the passenger’s feet accelerating them towards the centre of the turn. 

$A$ and $B$ are two objects with mass $6  kg$ and $34  kg$ respectively. Then

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

  1. $A$ has more inertia than $B$

  2. $B$ has more inertia than $A$

  3. $A$ and $B$ both have same inertia

  4. None of the above is true

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Correct Option: B
Explanation:

Mass is the count of inertia. 

More is the mass, more is the inertia 

$P$ and $Q$ are two objects with masses $5  kg$ and $30  kg$ respectively. Then

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

  1. $P$ has more inertia than $Q$

  2. $Q$ has more inertia than $P$

  3. $P$ and $Q$ have the same inertia

  4. Neither $P$ nor $Q$ has any inertia

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Correct Option: B
Explanation:

Inertia is the quality in matter (matter is anything you can touch) that lets it stay still if it is still, or keeps it moving if it is moving.

Since Q has more mass it has more inertia than P.

Galileo's law of inertia is another name for newton's (...) law of motion

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

  1. First

  2. Second

  3. Third

  4. Any one of the above

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Correct Option: A
Explanation:

Galileo's law of inertia is another name for newton's First. law of motion
Newton's first law 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. Inertia comes from mass. Objects with more mass have more inertia

The term 'mass' is analogous to physical quantity

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

  1. Weight

  2. Inertia

  3. Force

  4. Acceleration

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Correct Option: B
Explanation:

The property of a body to resist any change in its state of rest or of motion in a straight line is called its inertia.