A body starts from rest and accelerates uniformly at 5ms^-2 until it attains a velocity of 25ms-1. Calculate the time taken to attain this velocity

Answer Details

To find the time taken for a body to attain a given velocity with a constant acceleration, we can use the equation: v = u + at where: - v is the final velocity (25 m/s in this case) - u is the initial velocity (0 m/s since the body starts from rest) - a is the acceleration (5 m/s^2 in this case) - t is the time taken Substituting the given values, we get: 25 m/s = 0 m/s + 5 m/s^2 × t Simplifying this equation, we get: t = 25 m/s ÷ 5 m/s^2 = 5 s Therefore, the time taken for the body to attain a velocity of 25 m/s is 5 seconds. So the answer is option B - 5.0s.