Two people walking on a sidewalk have the following equations of motion:
xi = 8.2 m + (-1.1 m/s)t
x2 = 5.9 m + (1.7 m/s)t
(a) Which person is moving faster? (b) Which
person
will be at x = 0 at some time in the future?

Astone is dropped with no initial velocity from the top of a cliff and hits the ground a time of 3.9 s later. what is the height of the cliff, in units of meters? you may assume that air resistance is negligible. give the answer as a positive number question 15 a figure skater is rotating at a rate of 200 revolutions per minute. what is the angular speed, in units of rad/s? 200 o 20.9 12000 o 3.33

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

What is a subatomic particle with a negative charge and very little mass?