Answer:
400 J
Explanation:
Work is done when a force that is applied to an object moves that object.
The work is calculated by multiplying the force by the amount of movement of an object
W = F * d
here the man has to work against the gravitational field. (against his weight)
F =100 N
Work done = F * d
= 100 * 4
= 400 J
Answer:
11,100 N
Explanation:
Draw the car on the incline. Label the weight and normal forces. Call the direction normal to the incline y, and the direction parallel to the incline x.
If it helps, rotate the incline so that the surface of the incline is flat.
Use trigonometry to determine the components of the weight force. The y component of the weight is:
Wᵧ = mg cos θ
Wᵧ = (1150 kg) (9.8 m/s²) (cos 8.70°)
Wᵧ = 11,100 N
Answer:
Minimum diameter=1.714
Explanation:
Angular magnification=fob/fey=42
fob=40*fey
Hence minimum diameter=diameter of objective/angular magnification
minimum diameter=72/42=1.714
W=350 J=M g H
Solve for the height, H
G=9.8 m/s^2
M=7kg
H will be in meters if you use those units.