Question

You wish to lift a 12,000 lb stone by a vertical distance of 15 ft. Unfortunately, you can only generate a maximum pushing force of 2,000 lb.

What is the amount of work you must input
in order to move the stone?

What is the actual mechanical advantage (AMA) required by a machine to complete the work

You build a ramp to create the ideal mechanical advantage. What is the length of the ramp in feet?

Answer 1

Honestly i feel like whatever he said was okay




Explanation: im so sorry wish u best of luck

Answer 2

A) 180000 lbft

B) 6

C) 90 ft

Step-by-step explanation:

work to be imputed is

Wi = F x d

= 12,000 lb x 15 ft

= 180000 lbft of work

Work you can produce is

Wa = F x d

= 2000 lb x 15 ft = 30000 lbft

Mechanical advantage that will be needed = Wi/Wa = 180000/30000

= 6

Lenght of ramp = 6 x 15 ft = 90 ft