Question

A tractor ploughing a field accelerates at 2 m/s2

for 10 metres, after which its velocity is 7 m/s.
Calculate the tractor's velocity before it started accelerating.​

Answer 1

3 m/s

Step-by-step explanation:

Given:

a = 2 m/s²

Δx = 10 m

v = 7 m/s

Find: v₀

v² = v₀² + 2a (x − x₀)

(7 m/s)² = v₀² + 2 (2 m/s²) (10 m)

v₀ = 3 m/s