a force of 16N applied 4.0kg block that is at rest on a smooth, horizontal surface. What is the velocity of the block at t = 5 seconds?
A
4ms-1
B
10ms-1
C
20ms-1
D
50ms-1
E
80ms-1
Verified Correct Answer: C.
Physical Principles & Numerical Solution
F = ma
= \(\frac{m(u - v)}{t}\)
16 = \(\frac{4(v - 0)}{5}\)
v = 20ms-1
Source: Myschool Past Questions Archive (Record #28862)