When a power of 310 watts is applied to it, a pulley lifts box a one meter. the same pulley is used to lift box b. when the same amount of power is applied to box b, it is raised two meters. what can you say about the mass of the two boxes?

a. the mass of box a is half the mass of box b.
b. the mass of box a is three times the mass of box b.
c. the mass of box a is one–third the mass of box b.
d. the mass of box a is double the mass of box b.

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.