a man of 70kg carries a mass of 10kg to the top of a building 100m high.calculate work done by the man.take g=10m/s
Work = (weight)*(elevation change)
= M g H
Do the numbers
To calculate the work done by the man, we will use the formula:
Work = Force × Distance
First, we need to calculate the force exerted by the man. The force exerted by an object is equal to the weight of the object, which is given by:
Force = Mass × Acceleration due to gravity
Here, the mass of the object being carried is 10 kg and the acceleration due to gravity, g, is given as 10 m/s².
Force = 10 kg × 10 m/s²
Force = 100 N
Now, we have the force exerted by the man, which is 100 N. The distance over which the force is applied is 100 m, as the building is 100 m high.
Using the formula for work, we can calculate the work done by the man:
Work = Force × Distance
Work = 100 N × 100 m
Work = 10,000 joules (or 10,000 J)
Therefore, the work done by the man is 10,000 joules (J).