A solid 0.6750 kg 0.6750 kg ball rolls without slipping down a track toward a vertical loop of radius R = 0.6750 m R=0.6750 m . What minimum translational speed v min vmin must the ball have when it is a height H = 1.039 m H=1.039 m above the bottom of the loop in order to complete the loop without falling off the track? Assume that the radius of the ball itself is much smaller than the loop radius R R . Use g = 9.810 m/s 2 g=9.810 m/s2 for the acceleration due to gravity.

1.in one challenge on the titan games, competitors have to lift 200 pounds up a long ramp. angel is able to move the weight in 42 seconds. anthony gets it done in only 38 seconds. which statement is true? angel has more power than anthony. angel does more work than anthony. anthony does more work than angel. anthony has more power than angel. 2.a mountain climber exerts 41,000 j of work to climb a cliff. how much power does the climber need if she wants to finish in only 500 seconds? power = work / time 20,500,000 watts 82 watts 0.0122 watts 41,500 watts 3.your family is moving to a new apartment. while lifting a box 83 joules of work is done to put the box on a truck, you exert an upward force of 75 n for 3 s. how much power is required to do this? (hint: you only need two of the 3 numbers given! ) power = work / time 249 watts 25 watts 2075 watts 27.7 watts

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

Carbon 14 is a naturally occurring stable