You can raise an object to a height of 2 meters by pulling down a distance of 8 meters on a pulley with a force of 40 N. How heavy an object can you lift with his effort?

160 N

Explanation:

Since, work done by effort = work done by load,

Fd = F'd' where F = effort force = 40 N, d = distance moved by effort = 8 m, F = load and d' = distance moved by load = 2 m.

So, Fd = F'd'

40 N × 8 m = F' × 2 m

320 Nm = 2F m

So, F = 320 Nm/2m

= 160 N

So, the object that can be lifted is an object of 160 N

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