Question

a constant retarding force of 40N acts on a body of mass 5 kg moving initially E with a speed of 8 ms‐¹ how long does the body take to stop​

Answer 1

Answer:

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4s

Explanation:

F = ma

-40 = 5 × a

a = -8 m/s²

and ,

v² = u² + 2as

u² = - 2as                 (v = 0)

8² = - 2 [-8] s

64 = 16 s

d = s = 64/16 = 4s

Answer 2

Answer:

PLEASE MARK ME AS BRAINLIEST

Explanation:

F = ma

-40 = 5 × a

a = -8 m/s²

and ,

v² = u² + 2as

u² = - 2as                 (v = 0)

8² = - 2 [-8] s

64 = 16 s

d = s = 64/16 = 4s