do you mean like this ?
W = KE / t
= 0.5 m v^2 / t
m/t = 0.5 kg.
v = 2 m/s
so, W = 1 W ? is this right for question (b) ?
and
P = F.v
= [m.(dv/dt) + v (dm/dt)].v ; dv/dt = 0
= (dm/dt) . v^2
= 2 W for question (a) ?
Homework Statement
Sand falls at a rate of 0.5 kg/s onto a conveyor belt which is moving at a constant speed of 2.0 m/s.
Questions:
a. Find the power expended in driving the belt!
b. Find the rate at which the sand acquires kinetic energy!
c. Account for any difference between the...