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
Correct Answer: Option C
Explanation
F = ma
= (frac{m(u – v)}{t})
16 = (frac{4(v – 0)}{5})
v = 20ms-1