The deeper you go, the more rock must be supported so the more force is required and the pressure goes up.
Answer
given,
mass of the crate = 53 Kg
force applied by the worker = 180 N
Angle made with the horizontal = 35°
crate moves = 2.9 m
a) The work done equals the force in the direction of the displacement, times the displacement
W = F_x ×d
W = 180 cos 35° × 2.9
W = 427.6 J
b) A force that is perpendicular to the direction of the displacement does not do any work so work done by gravitational force is zero
c) Similarly for the normal force the work done will be zero.
d) Total work done by the crate is equal to 427.6 J
As we know that P=IV so P = (0.5A)(4.5V)
P= 2.25 watt
6.84m
Explanation:
According to this formula
<span>speed of wave=wavelength×frequency</span>
you have
<span>wavelength=<span>speedfrequency</span>=<span><span>342 m<span>s<span>−1</span></span></span><span>50<span>s<span>−1</span></span></span></span>=<span>6.84 m</span></span>
Answer:
The speed of roller coaster at the ground is 41.6 m/s.
Explanation:
mass of roller coaster, m = 756.5 kg
height, h = 88.2 m
(a) Let the speed of car at the ground is v.
Use conservation of energy
Potential energy at height = kinetic energy at bottom
