An electric fan is turned off, and its angular velocity decreases uniformly from 520 rev/min to 240 rev/min in a time interval of length 3.85 s. part a) find the angular acceleration in rev/s^2. part b) find the number of revolutions made by the motor in the time interval of length 3.85 s.

Which of the following correctly describes the early view of catastrophism?

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.