Answer
given,
angle with horizontal = 12°
constant speed with the slope = 1 m/s
Work on the skier to move 8 m = 900 J
a) Rope moved with constant speed
change in kinetic energy is equal to zero
work done by the force of the rope = 900 J
rate of force of the rope when skier move with
b) v = 1 m/s total time t = 8 s
Power =
=
= 112.5 W
c) v = 2 m/s total time t = 8/2 = 4 s
Power =
=
= 225 W
Hi there!
Using Hooke's Law:
F = Force (N)
k = Spring constant (N/m)
x = displacement from equilibrium
We are given the force and displacement, so solve for 'k':
The pump is powered by an electric motor that drives an impeller, or centrifugal pump. The impeller moves water, called drive water, from the well through a narrow orifice, or jet, mounted in the housing in front of the impeller.
A plane has more mass in it. Also, the engine is very strong which it makes the plane able to push through the wind. When the wind is pushing, it goes by it because of the engine.
