An alpha particle (helium nucleus) has velocity vvl+vyj + 2k km/sec in a region with magnetic field b = 101-20) + 30k mt·the x-component of the force is 4x1017 n and the y-component is 2x101 n. what are v, vy, and f?

Aball is thrown horizontally from a cliff at 8m/s .in what direction is the ball moving 2s later?

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.

Aforklift raises a box above the floor and does 2,000 j of work. if the forklift motor consumes 3,000 j of electrical energy from the battery to raise the box, what is the efficiency of the lift?