The masses of the blocks are m1 = 18.0 kg and m2 = 11.0 kg, the mass of the pulley is M = 5.00 kg, and the radius of the pulley is R = 0.100 m. Block m2 is initially on the floor, and block m1 is initially 4.60 m above the floor when it is released from rest. The pulley's axis has negligible friction.
a) How much time (in s) does it take block m1 to hit the floor after being released?
b) How would your answer to part (a) change if the mass of the pulley were neglected?

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

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.

Acid precipitation chemically weathering a 5.0-kg limestone rock . which coukd be the result ?