Question

chemistry and physics
answer
​

Answer 1

1) Motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.

Types of Motion:-

1)Linear Motion

2) Rotary Motion

3) Oscillatory Motion

Calculating acceleration involves dividing velocity by time — or in terms of SI units, dividing the meter per second [m/s] by the second [s]. Dividing distance by time twice is the same as dividing distance by the square of time. Thus the SI unit of acceleration is the meter per second squared .

2) According to Newton's second law of motion, the rate of change of a body/object is directed proportional to force applied to it and takes place in the direction in which the force acts.

Force=Mass×Acceleration

You may have noticed that while catching the faster-moving cricket ball,a fielder often pulls his hand backward with the moving ball. This is because In doing so, the fielder increases the time during which the high velocity if the moving ball decreases to zero. Therefore, the Acceleration of the ball decreases and therefore impact of catching the faster-moving ball is also reduced and the fielder did not get hurt in his hand.

3) Newton's first law of motion states that, everybody continues to be in its state of rest or uniform motion along a straight line unless compelled to change its state by an external force.

Newton's second law of motion states that the rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction of the force.

Newton's third law of motion states that for every action there is. an equal and opposite reaction.

4) Inertia: A characteristic of an object that resists changes to its state of motion.

• Explanation: Inertia is an intrinsic characteristic of the object related to its mass. Inertia tells you how much force it will take to cause a particular acceleration on the object.

• Inertia= if the body is at rest it will remain rest and it is moving it will continue moving in

Momentum: The resistance of an object to a change in its state of motion.

• Explanation: Momentum is a function of an object’s mass and velocity. Momentum is a measure of the kinetic energy of the object

• Momentum is the product of mass and velocity. momentum(P) = mass (M) × velocity(V)