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

☆Freë poïnts☆

☺☹☺☹☺☹​

Answer 1

Step-by-step explanation:

By using the equation of motion

v=u+at

By substituting the given values in the above equation

15=6+105t

Then the time is0.0857sec

The distance covered is given as

S=ut+21at2

S=6×0.0857+21×105×(0.0857)2

S=0.514+0.385

The distance covered is0.899m

Answer 2

Step-by-step explanation:

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