- #1

iwonde

- 31

- 0

The equation that I used is: P_av = (delta W)/ (delta t)

Since 1hp = 746W --> 0.50hp = 373 W

delta W = (P_av)(delta t) = 373 W x 60 s = 22380 J

Work required to lift one crate = mgh = 30kg x 9.8 m/s^2 x 0.9m = 264.6J

Number of crates = 22380J / 264.6 J = 85

85 is not the correct answer. What did I do wrong?

Thanks.