Theodore is pulling a cart with a rope. Assuming he always pulls the rope with the same amount of force, which arrangement would allow him to most rapidly change the kinetic energy of the cart: pulling at 24° above horizontal, or 16° below horizontal?

Phase changes are chemical changes. true or false

What would be the result of an alpha particle coming into a magnetic field? a) the alpha particle will stop moving. b) the alpha particle will reverse its direction. c) the alpha particle will be deflected in a curve path. d) the alpha particle will continue to travel in a straight line.

Two steel balls, each of mass m, are welded to a light rod of length l and negligible mass and are initially at rest on a smooth horizontal surface. a horizontal force of magnitude f is suddenly applied to the rod as shown. determine (a) the instantaneous acceleration a of the mass center g and (b) the corresponding rate at which the angular velocity of the assembly about g is changing with time.