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# A body of mass 2kg moving vertically upwards has its velocity increased uniforml...

### Question

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]

A) 15N

B) 20N

C) 35N

D) 45N

### Explanation:

F = mg + ma

F = 2 [10 + $$\frac{(40 - 10)}{4}$$]

F = 35 N

## Discussion (3)

• Reedoh

F=mg+ma
F=m(10(40-10)/4
F=0.2*10(30)/4
F=2(30)/4
F=60/4
=15

F = 2 [10 + $$\frac{(40 - 10)}{4}$$]