Imagine you find a 2 kg book on the floor and lift it 0.75 meters and put it on a table. find the work done ?
Work = M g H
M, g and H stand for mass, (acceleration of) gravity and height. Multiply them.
Show your own work for further assistance.
thank u and the answer will be
w= mgh = 2*10*0.75 = 15j
correct ?!!
Actually, g = 9.8 m/s^2, not 10, but that is pretty close.
To find the work done, you need to use the formula:
Work = Force x Distance x cos(angle)
In this case, the force can be calculated using Newton's second law, which states that force equals mass times acceleration. Since the book is being lifted vertically, the acceleration is equal to the acceleration due to gravity, which is approximately 9.8 m/s².
Force = mass x acceleration
Force = 2 kg x 9.8 m/s²
Next, you need to calculate the distance the book is being lifted, which is given as 0.75 meters.
Now, we can substitute these values into the work formula:
Work = (2 kg x 9.8 m/s²) x 0.75 meters x cos(0°)
The angle of lifting the book vertically is 0°, so the cosine of 0° is 1.
Work = (2 kg x 9.8 m/s²) x 0.75 meters x 1
Work = 14.7 Joules
Therefore, the work done in lifting the 2 kg book 0.75 meters vertically is 14.7 Joules.