Class XI mass and energy are equivalent and are related by E = mc2 E = 2mc2 E = mc2/2 E = mc3 A rain drop of mass 2.00 g falls from a height 1.00 km. It hits the ground with a speed of 50.0 m/s. What is the work done by the gravitational force? (Take g = 10 m s−2s−2) 26 J 20 J 22 J 24 J In a graph of F(x) vs x, the area under the curve represents the momentum of F(x). represents energy of F(x). represents work done by F(x). represents the impulse of F(x) A 50.0-kg marathon runner runs up the stairs to the top of a 443-m-tall Tower. To lift herself to the top in 15.0 minutes, what must be her average power output? 261 W 221 W 241 W 201 W A 0.800-kg ball is tied to the end of a string 1.60 m long and swung in a vertical circle. (a) During one complete circle, starting anywhere, calculate the total work done on the ball by (i) the tension in the string and (ii) gravity 30 J, 30 J 0, 0 10 J, 10 J 25 J, -25 J Do you really want to submit this quiz? Cancel Submit Quiz