You use an inclined plane to move furniture into a truck. You perform 352 kj of work, but only do 229 kj of useful work. What is the efficiency of the inclined plane?

Question

asked Aug 25, 2019 48.0k views

2 Answers

Aaron Miler · Answer 1 · 2019-08-30T21:27:03+0000

Answer:

The efficiency of the inclined plane is 65.05%.

Step-by-step explanation:

It is given that, you use an inclined plane to move furniture into a truck.

Work done performed by the person, i.e. input work
$W_i=352\ kJ$

Useful work done by the person, i.e. input work
$W_o=229\ kJ$

The efficiency of any simple machine is always less than 1. For the inclined plane it is given by :

$\eta=(W_o)/(W_i)* 100$

$\eta=(229\ kJ)/(352\ kJ)* 100$

$\eta=65.05\%$

So, the efficiency of the inclined plane is 65.05%. Hence, this is the required solution.