The 50 kg crate is now hoisted up through a vertical distance of 2 m using a motorized winch. How much work is done on the crate by the motor? Question 2 answersA. 98 JB. 49 JC. 0 JD. 980 JE. 196 J
Energy= mass* g* h = 50*9.8*2 =980 J at the top the crate wioll have increased in gravitational potential energy by 980 J therefore 980J is required to move the crate up two metres energy is conserved
PE = mgh = 50 x 9.8 x 2 = 980 J =D is the correct answer.
