a pulley is used to lift a mass with a force of 900N to a height of 10 metres in 2 minutes.find the work done by the force and also the power
75
ans
90
92
Grams of force to lift the weight with 1 pulley
To find the work done by the force, we can use the formula:
Work = Force × Distance
In this case, the force is 900 N and the distance is 10 meters. Plugging these values into the formula, we get:
Work = 900 N × 10 m = 9000 J (Joules)
Therefore, the work done by the force is 9000 Joules.
To find the power, we can use the formula:
Power = Work / Time
In this case, the work done is 9000 Joules and the time taken is 2 minutes. We need to convert minutes to seconds since power is normally expressed in Watts, which is joules per second. There are 60 seconds in 1 minute, so 2 minutes is equal to 2 × 60 = 120 seconds.
Plugging these values into the formula, we get:
Power = 9000 J / 120 s = 75 W (Watts)
Therefore, the power is 75 Watts.