Question

Train starting from rest moves with uniform acceleration of 5 m/s2. Finds its velocity when it has travelled at a distance of 1 km
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Answer 1

Answer:

100 m / s

Explanation:

displacement = 1 km = 1000 m

acceleration = 5 m / s²

unitial velocity = 0 m / s

by Newtons third law ,

v² = u² + 2as

by putting values ,

v² = 0² + 2 × 5 × 1000

:. = 0 + 10000

:. v² = 10000

by taking square root on both sides ,

√v² = √10000

:. v = 100 m / s