Pls help asap
What is the mechanical advantage of this pulley system?

A. 1/2
B. 1
C. 2
D. 3

Picture a all traveling at a constant speed around the inside of a circular structure. is the ball accelerating? explain your answer

Awind turbine is initially spinning at a constant angular speed. as the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.173 rad/s2. after making 2870 revolutions, its angular speed is 132 rad/s. (a) what is the initial angular velocity of the turbine? (b) how much time elapses while the turbine is speeding up?

Can you receive a shock severe enough to prevent you from releasing the wire from an ordinary outlet with dry hands? a. no b. yes explain