Two balls have the same mass of 5.00 kg. suppose that these two balls are attached to a rigid massless rod of length 2l, where l = 0.550 m.
one is attached at one end of the rod and the other at the middle of the rod.
if the rod is held by the open end and rotates in a circular motion with angular speed of 45.6 revolutions per second,

(a) what is the tension for the first half of the rod, i. e., between 0 and l if the pivot point is chosen as origin?

(b) what is the tension for the second half of the rod, i. e., between l and 2l if the pivot point is chosen as origin?

Arowboat passenger uses an oar to push the boat off the dock by exerting a force of 40n for 3.0s. what impulse acts on the boat.

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".

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?