Answer:
C. 100 ft/min
Explanation:
A scalar quantity has no direction.
A scalar with direction is called a vector.
Answer:
Answered
Explanation:
A) The work done by gravity is zero because displacement and the gravitational force are perpendicular to each other.
W= FS cosθ
θ= 90 ⇒cos90 = 0 ⇒W= 0
B) work done by tension
W= Tcosθ×S= 5cos30×2.30= 10J
C) Work done by friction force
W= f×s=1×2.30= 2.30 J
D) Work done by normal force is Zero because the displacement and the normal force are perpendicular to each other.
E) The net work done= Work done by tension in the rope - frictional work
=10-2.30= 7.7 J
Answer:

Explanation:
As we know that for spring block system the angular frequency is given as

now we know that

also we know that

so we have


now we know that speed of an SHM at its equilibrium position is given as

now plug in all values in it


Answer:
P = 0.14 hp
Explanation:
The power required by the ship is given as:

where,
P = Power = ?
m = mass to pump = (12 lb)(1 kg/2.20 lb) = 5.44 kg
g = acceleration due to gravity = 9.81 m/s²
h = height = 2 m
t = time = 1 s
Therefore,

Converting to horsepower (hp):

<u>P = 0.14 hp</u>