Question

if a car travel 50m distance in 4s with an acceleration of 5m/s2, then what was it initial speed​

Answer 1

Answer:

2.5m/s

Explanation:

s = 50m

t = 4s

a = 5m/s²

u = ?

Using 2nd equation of motion,

s = ut + 1/2at²

50 = u(4) + 1/2 × 5 × (4)²

50 = 4u + 1/2×5×16

50 = 4u + 40

4u = 50-40

4u = 10

u = 10/4

u = 2.5m/s

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