A 63kg object needs to be lifted 7 meters in a matter of 5secs. approximately how much horsepower is required to achieve this task? (a.) 864.36hp. (b) 0.59hp (c) 441hp (d) 1.16hp

Question

Physics

Macintosh

14 May, 21:38

A 63kg object needs to be lifted 7 meters in a matter of 5secs. approximately how much horsepower is required to achieve this task? (a.) 864.36hp. (b) 0.59hp (c) 441hp (d) 1.16hp

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Answers (1)

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Kaya Kline · Answer 1

Force needed to lift the object = (mass) (gravity)

= (63 kg) (9.8 m/s²) = 617.4 Newtons

Work = (force) x (height)

= (617.4 N) (7 m) = 4,321.8 joules

Rate required to get it done in 5 sec = (4,321.8 J) / (5 sec)

= 864.4 watts

1 HP = 746 watts

(864.4 watts) x (1 HP / 746 watts) = 1.159 HP.

Choice (d) looks encouraging.