Agolf ball is dropped from rest from a height of 9.5m. it hits the pavement then bounces back up rising just 5.7 m before falling back down again. a boy then catches the ball on the way down when it is 1.20 m above the pavement. ignoring air resistance, calculate the total amount of time the ball is in the air, from drop to catch.

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Awave travels at a speed of 5.2 m/s. if the distance between crests is 0.40 m, what is the frequency of the wave? use f=v/wavelength a. 13 hz b. 2.1 hz c. 0.077 hz d. 5.6 hz

What are similarities and differences between refraction, reflection, diffraction and absorption?