Question

Motion lesson
please give me perfect answer class 9​

Answer 1

Answer:

1) (b) uniform acceleration

2) (b) at rest

3) (a) in uniform motion

first one is (b) because If the displacement of an object is proportional to the square of the time taken then the body is moving with uniformly accelerated motion as it will follow Newton's second equation of motion for a particular initial velocity, which can be given by, s=ut+21at2.

second one (b) because The slope of velocity-time graph represents the acceleration. Since straight line is inclined to the time axis, slope is uniform and constant, acceleration will be uniform.

third one is (a) because the velocity remains same throughout, there is no change in velocity with time.

the velocity remains same throughout, there is no change in velocity with time.That is velocity is constant throughout the time interval, therefore, it is in uniform motion.

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Explanation:

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Answer 2

1) (b) uniform acceleration

2) (b) at rest

3) (a) in uniform motion

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