Physics 30,, vertical free fall
linda went skydiving 12 times. her highest dive was at 14500m. if linda pulled her shoot at 4m and friction is not taken into account, determine:

a) the speed she was travelling when she pulled her shoot
b) the time it took her to travel that distance

a girl out i have an exam tomorrow w/ no idea what i'm doing : (

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

In a game of pool, ball a is moving with a velocity v0 of magnitude v0 = 15 ft/s when it strikes balls b and c, which are at rest and aligned as shown. knowing that after the collision the three balls move in the directions indicated and assuming frictionless surfaces and perfectly elastic impact (that is, conservation of energy), determine the magnitudes of the velocities va, vb, and vc.

What is the answer to these problems 30 pt