Question

Answer in one or two sentence

Q 1 .what is acceleration ? write
the formula for acceleration.

Q 2 .what is uniform and non uniform linear motion ? write one example .






I want a correct and a meaningful answer .







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Answer 1

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1). Acceleration (a) is the change in velocity (Δv) over the change in time (Δt), represented by the equation a = Δv/Δt. This allows you to measure how fast velocity changes in meters per second squared (m/s^2). Acceleration is also a vector quantity, so it includes both magnitude and direction

2) UNIFORM MOTION - DEFINITION

A body is said to be in uniform motion if its velocity does not change with time. For a body in uniform motion, net external force is always equal to zero. An example of uniform motion is a body sliding on a frictionless surface with a constant velocity.

NON-UNIFORM MOTION - DEFINITION

A body is said to have non-uniform motion if its velocity changes with time. Such a body is necessarily under the influence of an external force. An example of non-uniform motion is a body rotating at a constant speed. Its velocity is not constant because its direction of motion changes every instant.

UNIFORM V/S NON-UNIFORM MOTION - DEFINITION

S.No. Uniform Motion Non-Uniform motion

1. Velocity is constant with time. Velocity changes atleast once in the given interval of time.

2. External force is zero. External force is non-zero.

3. Ideal scenario. Realistic scenario.

4. Ex: Body moving on a frictionless table Ex: Body under freefall

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Answer 2

Answer:

1. acceleration is rate of change in velocity to the change in time .it is denoted by symbol a

a= change in velocity/ time taken

2.uniform linear motion is defined as a motion, where a velocity of the body traveling in the straight line remains the same.

example- A car going along a straight level road at steady speed.

non- uniform linear motion is defined as a motion,the movement in which the object does not cover the same distance in same time interval.

example- A man running in a 100m race

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