An object reaches a velocity of 147 m/s in 15 s at a uniform acceleration in a vertical plane. Calculate the size of the uniform acceleration. Also determine whether it was an upward or a downward movement from rest.
To calculate the size of the uniform acceleration, we can use the equation:
velocity = initial velocity + (acceleration * time)
Given that the initial velocity is 0 (from rest), the equation becomes:
147 m/s = 0 + (acceleration * 15 s)
Rearranging the equation, we can solve for the acceleration:
acceleration = 147 m/s / 15 s
acceleration = 9.8 m/s²
Therefore, the size of the uniform acceleration is 9.8 m/s².
To determine whether it was an upward or a downward movement, we need to consider the direction of the acceleration. Since the acceleration due to gravity is always downwards, an acceleration of 9.8 m/s² indicates a downward movement.