Question

2. A sailor pushes a 100.0 kg crate up a ramp that is 3.00 m high and 5.00 m long onto the deck of a ship. He

Answer 1

Answer:

Mechanical advantage of the ramp = $\frac{980}{650} = 1.51$

Efficiency of the ramp = $\frac{Actual\hspace{0.1cm} work\hspace{0.1cm} done}{Work}$ = $\frac{100\times 9.8\times 3}{650\times 5} = \frac{2940}{3250} = 0.9046 = 90.46%$

Explanation:

i) Mechanical advantage of the ramp = $\frac{980}{650} = 1.51$

ii) Efficiency of the ramp = $\frac{Actual\hspace{0.1cm} work\hspace{0.1cm} done}{Work}$ = $\frac{100\times 9.8\times 3}{650\times 5} = \frac{2940}{3250} = 0.9046 = 90.46%$