Question

A powerful bike can accelerate from rest to 28 m/s in only 4 s. The distance travelled by bike in 4 seconds is
60 m.
55 m.
50 m.
56 m.

Answer 1

Answer:

4th Option is correct.

Hope it helps.

Answer 2

Answer:

56 meters

Explanation:

given,

u= 0m/s

v=28m/s

t=4s

a=?????????s=????????

v=u +at

28= 0 + 4a

4a=28    { we can write a=7m/s² }

∴ we can write the average acceleration = 7m/s2

displacement (s)  v²=u²+2as

                         28²= 0²+(2x7s)

                        784= 14s

                        s= 784/14

                        s= 56

∴the distance travelled = 56 meters

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