CBSE Class 9 Science Question 29 of 30

Motion — Question 4

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Question

Question 4

A racing car has a uniform acceleration of 4 ms-2. What distance will it cover in 10 s after start?

Answer

Given,

Initial velocity (u) = 0

Acceleration (a) = 4 ms-2

Time period (t) = 10 s

According to the second equation of motion,

S = ut + 12\dfrac{1}{2}at2

Substituting we get,

S = 0 + 12\dfrac{1}{2} x 4 x 10 x 10

= 200 m

The car will cover a distance of 200 m.