the speed of 25 km per hour of a car become 70 km per hour in 5 second find the average acceleration
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Answer:2.5 m/s²
Explanation:
Let, V1 = 25km/Hr
V2 = 70km/Hr
∆t = 5sec
acc = ?
acc = V2 - V1 / ∆t
= (70-25)km/Hr ÷ 5sec
= 45km/Hr ÷ 5sec
since, 45km/Hr = 45000m/3600sec
Hence,
acc = 45000m / (3600 × 5)sec²
=5/2 m/s²
=2.5 m/s²
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