Stephan, a student in a physics class makes the following statement: All the dots are moving at the same rotational speed. Each dot completes one rotation in the same amount of time. Aaleyah says: The dots closer to the rim travel farther for each rotation, so they are moving at greater tangential speed. Which student is correct

If forces acting on an object are unbalanced. true or false

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

An electron in an x-ray machine is accelerated through a potential difference of 1.00 × 104 v before it hits the target. what is the kinetic energy of the electron in electron volts?