JAMB - Physics (1997 - No. 7)
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
स्पष्टीकरण
F = mg + ma
F = 2 [10 + \(\frac{(40 - 10)}{4}\)]
F = 35 N
F = 2 [10 + \(\frac{(40 - 10)}{4}\)]
F = 35 N