Tag: force and newton's laws of motion

Questions Related to force and newton's laws of motion

The inertia of an object tends to cause the object:

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

  1. to increase its speed

  2. to decrease its speed

  3. to resist any change in its state of motion

  4. to decelerate due to friction

Show answer
Correct Option: C
Explanation:

Inertia is the physical property of a body to resist any change in its state of rest or of uniform motion.

X and Y are two objects with masses $100\ kg$ and $75\ kg$ respectively, then :

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

  1. Both will have the same inertia

  2. Y will have more inertia

  3. X will have more inertia

  4. Both will have less inertia

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Correct Option: C
Explanation:

The object having more mass has more inertia and vice-versa.As object X has more mass than Y, thus X has more inertia.

Name the property of matter due to which a body continues in its state of rest or uniform motion unless an external force acts on it is:

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

  1. Inertia

  2. Elasticity

  3. Viscosity

  4. Density

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Correct Option: A
Explanation:

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

When the brakes are applied to bike the back seater moves forward why?

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

  1. Due to height

  2. Due to weight

  3. Due to inertia

  4. None

Show answer
Correct Option: C
Explanation:

When the bike stops suddenly, the back seater will get a jerk in a forward direction due to inertia of motion as the bike is stopped the body in contact with the bike will also try to stop but the upper portion of the body will still try to maintain its motion.

Mass is a measure of:

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

  1. weight

  2. inertia

  3. friction

  4. matter

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Correct Option: B
Explanation:

Mass of the object is the measure of its inertia in the sense that greater the mass of the object, greater will be its inertia and vice-versa.

Identify which of the following quantity describe object's resistance to change in motion.

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

  1. acceleration

  2. velocity

  3. mechanics

  4. force

  5. inertia

Show answer
Correct Option: E
Explanation:

Inertia is a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

Mass of the object is the measure of inertia.
For higher mass objects, acceleration is lesser on application of some force, $a=\dfrac{F _{net}}{m}$

Which of the following best describe about the statement " An object slides on a horizontal, frictionless surface".

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

  1. Inertia

  2. Unbalanced forces

  3. Action and reaction force pairs

  4. Universal gravitation

  5. Simple harmonic motion

Show answer
Correct Option: A
Explanation:

Law of inertia states that present state (in motion or stationary) of a body does not change until an external force is applied on it .

As the object  slides on a frictionless surface it means no external force is working on it ,so body will continue to slide due to inertia of motion.

On what factors does the inertia of motion depend?

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

  1. Mass

  2. Velocity

  3. Acceleration

  4. Displacement

Show answer
Correct Option: A
Explanation:

Inertia of motion depend upon mass

Which of the following safety features are used in vehicles to reduce the negative effects of inertia?

(i)Safety seat belts(ii)Automatic air bags(iii)Absorber bumpers
physics force and newton's laws of motion inertia and mass concept of inertia galileo's law and inertia

  1. Only (i) and (ii)

  2. Only (ii) and (iii)

  3. Only (i) and (iii)

  4. (i), (ii) and (iii)

Show answer
Correct Option: D
Explanation:

$Force=mass*\dfrac{momentum}{time}$

since the effect of inertia depend on force if the time of impact is increased and hence the same force will produce less effect of inertia the safety seat belt,automatic air bag,Absorber bumpers produce the same effect to decrease the negative effect of inertia.

The inertia of an object tends to cause the object:

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

  1. $to\ increase\ its\ speed$

  2. $to\ decrease\ its\ speed$

  3. $to\ resist\ any\ change\ in\ its\ state\ of\ motion$

  4. $to\ decelerate\ due\ to\ friction$

Show answer
Correct Option: C
Explanation:

Inertia of an object is the tendency of the object to resist change in  motion. The inertia is directly dependent on the mass of the body. 
Inertia resist any change in its state of motion and is of three types:

  1. Inertia of rest
  2. Inertia of motion
  3. Inertia of direction