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Question

The motion of a block sliding down a frictionless ramp can be described as motion with

A
A constant speed, independent of the slope of the ramp
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B
A constant speed that depends on the slope of the ramp
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C
An acceleration which increases as the block slides
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D
A constant acceleration less than 10 m/s2
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E
A constant acceleration greater than 10 m/s2
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Solution

The correct option is D A constant acceleration less than 10 m/s2

Given,

Acceleration of gravity, g=10m/s2

Motion of block is on ramp,

So, ramp have an angle, θ (0<θ<90o)

Component of gravity, that gives motion = gsinθ

If 0<θ<90o, then 0<sinθ<1

0<gsinθ<g

Hence, Acceleration is constant and less than 10m/s2
978341_1065571_ans_5a290b034b0f44d9837bd2306c18f4cf.jpg

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