The work done in lifting 30 kg of bricks to a height of 20 m on a building under construction is
A)61 J.
B)600 J.
C)2940 J.
D)5880 J.

Question

Quizplus · Accepted Answer

The work done is given by the formula W = mgh, where m is the mass of the object lifted, g is the acceleration due to gravity (approx. 9.8 m/s^2) and h is the height it is lifted to.

W = 30 kg x 9.8 m/s^2 x 20 m 
W = 5880 J

Therefore, the correct answer is D)5880 J.

The Work Done in Lifting 30 Kg of Bricks to a Height