Question

a body starting from rest starts running and attains a velocity of 6m s^-1 in 30 second . Then he slows down uniformly to 4m s^1 in next 5 s calculate his acceleration in both cases​

Answer 1

AnsweR :

• Initial velocity = 0 m/s
• Final velocity = 6 m/s
• Time = 30s

a = (v - u)/t

a = (6-0)/30 = 6/30 = 2/10 = 0.2 m/s²

________________

• Initial velocity = 6 m/s
• Final velocity = 4 m/s
• Time = 5s

a = (v - u)/t = (4 - 6)/5 = -2/5 = -0.4 m/s²