Which of the following is a compound machine?

Bicycle

Pulley

Ramp

Wedge

Which of the following is used to calculate mechanical advantage?

Fr/Fe

dr/de

de/dr

Fe/Fr

A man weighing 700 N lifts 50.0 N object 2.0 m high. He uses a lever and with a force of 10.0 N. What is the resistance force?

120 N
10.0 N
700 N
50.0 N

A pilgrim uses a block and tackle to lift a 225 N crate a distance of 16.5 m. She pulls 33.0 m of rope with a force of 129 N. What is the ideal mechanical advantage of machine?

0.50
2.00
1.74
0.573