Question

A body travels 200 cm in the first 2s and 220 cm in the next 5 s . Calculate the velocity at the end of the seventh second from the start

Answer 1

Explanation:

A body travels 200 cm in the first 2 seconds and 220 cm in the next four seconds. What will be its velocity at the end of the 7th second from the start? U+a=100 solving a=-15 m/s2 then u can solve for u =115 m/s. V=u+at=115+-15*7=10 cm/s.