Laws Of Motion

Outer part is the shorter part,
Mass connected to this part

Inner part is longer part,
Mass connected to this part

The frictional force is given by

Given,
,

Mass of the body
Acceleration

During collision of ball with the wall horizontal momentum changes (vertical momentum remains constant)

Coefficient of static friction

Centripetal force always acts towards the center and is given by

From Newton's second law of motion, the rate of change of linear momentum of an object is directly proportional to the external force applied on it and change always takes place in the direction of applied force.

Here,
and
From

Given,
We know that, net force acting on a stone,


vertically downwards

Step 1: Understanding Inertia
Inertia is a property of matter that causes an object to resist any change in its state of motion.
This means that an object will either stay at rest or continue moving at a constant velocity unless acted upon by an external force.
Step 2: Comparison with Other Terms
Force is an interaction that causes a change in the state of motion of an object, not a property that resists change.

Momentum is a measure of an object's motion, given by the product of its mass and velocity, and does not describe resistance to change.
Acceleration is the rate of change of velocity and also does not represent resistance to change.
Step 3: Conclusion Thus, the correct term for the property that resists change in motion is inertia.

Step 1: Inertia in Action
When the bus makes a right turn, passengers inside will experience inertia.
According to Newton's First Law of Motion, an object in motion tends to continue moving in a straight line unless acted upon by an external force.
The passengers inside the bus continue moving in the original direction (straight ahead) due to inertia.
Step 2: Effect on the Passengers
Since the bus turns to the right, the passengers' bodies will appear to move left relative to the bus.
This happens because their inertia resists the change in direction caused by the bus's turn.
Step 3: Conclusion
Therefore, the passengers will feel as though they are being pushed to the left and will lean leftwards.

Step 1: Apply Newton's First Law of Motion.
Newton’s first law states that an object will remain at rest or in uniform motion unless acted upon by an external force.

Step 2: Understand uniform velocity.
A particle moving with a constant speed along a straight-line path does not need a force to maintain its motion if there are no external forces acting on it.
This is because no force is required to keep an object in uniform motion.