A body of mass 3kg moves with V m/s when a force of 18 N acted on it. After covering 9 m , its velocity becomes V/2 m/s. Find V.
Answers
Answered by
0
As the speed decreased, the acceleratio is negative.
F = - 18 N = m a = 3 * a
=> a = - 6 m/sec^2
u = V m/s s = 9 m v = V/2
s = (v^2 - u^2) / (2a)
9 = (V^2 /4 - V^2 ) / ( -12)
V^2 = 144
V = 12 m/s
F = - 18 N = m a = 3 * a
=> a = - 6 m/sec^2
u = V m/s s = 9 m v = V/2
s = (v^2 - u^2) / (2a)
9 = (V^2 /4 - V^2 ) / ( -12)
V^2 = 144
V = 12 m/s
Similar questions