uestion 29 Not yet an pulley, starting from rest, is given an acceleration of 0.5 rad/s. What will be its speed in r.p.m. at the end of 2 minutes? If it is 2 iformly retarded at the rate of 0.3 rad /s, in how many minutes the pulley will come to rest? A- R T:に1ー-

Marge pulls Vinnie on a sled along a friction free surface. The combined mass of Vinnie plus sled is 18.5kg producing an acceleration of 0.6m/s^2. The rope on the sled makes a 35 degree angle with the ground below. a. How much work does Marge do while pulling the sled for 20m? b. How far could Marge pull the sled to expend 4001

Your bicycle has 10 gears, from low (easiest to pedal) to high (hardest to pedal). When you first start peddling, you usually use a low gear to accelerate from standing and then shift to a higher gear when you are at a high cruising (ground) speed so that you are always pedalling against the same resistance. One morning you forget to shift down and you try to start in a very high gear. Despite the fact that you usually go fast in high gear, you can't get anywhere at all. The next day you remember to start in low gear, but you forget to shift up. So you ride to school at the same ground speed as usual but in low gear all the way. Despite the fact that there is less resistance to pedalling in the low gear, your legs get more tired than usual.  Using you knowledge of force and resistance explain why they are more tired? Explain which skeletal fibers will be utilized in this case?

A roundtable is at rest and then is set in motion with a constant angular acceleration 25 rad/s2. What is the angular velocity in rad/s after one complete turn?