A body of mass 2kg moving vertically upwards has its velocity increased uniformly from 10ms-1 to 40ms-1 in 4s. Neglecting air resistance, calculate the upward vertical force acting on the body.[g = 10 ms-1]
- 15N
- 20N
-
35N
- 45N
The correct answer is: C
Explanation
F = mg + maF = 2 [10 + \(\frac{(40 - 10)}{4}\)]
F = 35 N