A stationary object of mass 4kg is set in motion by a net force of 5ON. If the object attains is speed of 5ms-1 in time. Calculate the value of t.
A
0.20s
B
0.40s
C
0.63s
D
0.80s
E
1.30s
Verified Correct Answer: B.
Physical Principles & Numerical Solution
F = ma = MV/t ∴ t = MV/F = 20/50 = 0.40s
Source: Myschool Past Questions Archive (Record #25208)