Question

how much power is needed to lift a box with a force of 780 newtons over a distance of 2 meters in 45 seconds

Answer 1

Answer:

34.67 W

Explanation:

Power is the rate at which work is done and can be found by using the formula

$p = \frac{w}{t}$

p is the power in Watts (W)

w is the workdone in joules

t is time in s

but workdone = force × distance

From the question

force = 780 N

distance = 2 m

workdone = 780 × 2 = 1560 N

Since we now have the value of workdone we can find the power

We have

$p = \frac{1560}{45} = 34.6666666...$

We have the final answer as

34.67 W

Hope this helps you