Question

How much force will your need to move a 200 pound refrigerator onto a truck bed that is five feet high if you use a 10 foot inclined plane?

Answer 1

Answer:

P = 100 lb

Explanation:

For an ideal machine:

$Work\ In = Work\ Out\\(P)(L)=(W)(H)$

where,

P = Effort = Input Force = ?

L = Effort Arm = Length of inclined plane = 10 ft

W = Load to be lifted = 200 lb

H = Load Arm = Height = 5 ft

Therefore,

$P(10\ ft) = (200\ lb)(5\ ft)\\\\P = \frac{(200\ lb)(5\ ft)}{10\ ft}$

P = 100 lb