Question

A cyclist is travelling at velocity 15.she applies brakes so that she doesn't collide with a wall in front of her at a distance of 18m .calculate the magnitude of deceleration

Answer 1

Answer:

Explanation:

Here is your answer.

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Answer 2

U = 15 m/s

V = 0 m/s

S = 18 m

(Deceleration, -a)

(Acceleration, a)

To find out a (acceleration),

2as = v^2-u^2

2×a×18 = 0^2 - 15^2

36a = 0-225

36a = -225

a = -255 / 36

a = -6.25 m/s^2

(Negative acceleration in sense it refers to decceleration or retardation)

Therefore,

The magnitude of decceleration = -6.25 m/s^2

(Hope that this helps )