Identical particles are placed at the l1 =50-cm and l2 =80-cm marks on a meter stick of negligible mass. this rigid body is then mounted so as to rotate freely about a pivot at the 0-cm mark on the meter stick. if this body is released from rest in a horizontal position, what is the angular speed of the meter stick as it swings through its lowest position?

Wavelength, frequency, and energy are related. what happens to a wave as it’s wavelength gets shorter?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

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.