a man lifts a 2 kg load to a height of 3m in 3 seconds. how much work was done ? how much power was demonstrated?
work=mgh
power=mgh/time
answer please how?
m=mass
g=9.8N/kg
a=acceleration
t=time in seconds.
H=height in meters
Put the values in, and calculate
Power in watts
work in joules
thank you
you can check if my answer is correct the work is 58.8J and power is 19.8watts ?
To find out how much work was done, we use the formula:
Work = Force × Distance
In this case, the force can be calculated using the formula:
Force = Mass × Acceleration due to gravity
The acceleration due to gravity on Earth is approximately 9.8 m/s². So, the force can be calculated as:
Force = 2 kg × 9.8 m/s² = 19.6 N
Now, we can calculate the work done:
Work = Force × Distance = 19.6 N × 3 m = 58.8 Joules
Therefore, the work done in lifting the load is 58.8 Joules.
To find out how much power was demonstrated, we use the formula:
Power = Work / Time
In this case, the time taken to lift the load is given as 3 seconds.
Power = 58.8 Joules / 3 seconds = 19.6 Watts
Therefore, the power demonstrated is 19.6 Watts.