Question

A cyclist is travelling at 20m/s .She apply break so that does not collide with a wall 18m away. What retardation must she have​

Answer 1

Answer:

Initial velocity, u=15m/s

Final velocity, v=0m/s

Distance, s=18m

Acceleration, a=?

Using relation, v

2

−u

2

=2as

0

2

−(15)

2

=2a×18

−225=36a

a=

36

−225

=−6.25m/s

2

So, deceleration is 6.25m/s

2

.

Step-by-step explanation:

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