The load L is lowered by the two pulleys which are fastened together and rotate as a single unit. For the instant represented, drum A has a counterclockwise angular velocity of 3.9 rad/sec, which is decreasing by 6.6 rad/sec each second. Simultaneously, drum B has a clockwise angular velocity of 6.2 rad/sec, which is increasing by 3.3 rad/sec each second. Calculate the accelerations of points C and D and the load L.

Visualize the problem and identify special cases first examine the problem by drawing a picture and visualizing the motion. apply newton's 2nd law, ∑f⃗ =ma⃗ , to each body in your mind. don't worry about which quantities are given. think about the forces on each body: how are these consistent with the direction of the acceleration for that body? can you think of any special cases that you can solve quickly now and use to test your understanding later? one special case in this problem is if m2=0, in which case block 1 would simply fall freely under the acceleration of gravity: a⃗ 1=−gj^.

What efficiency of a car's engine when heat input is 200,000 joules and waste heat is 150,000 joules? a. 75% b. 35% c. 25% d. 85%

The release of energy by the nucleus of atom as a result of nuclear fission is radiant energy true false