In most of the usa a typical house’s roof is inclined at an angle of 15 degrees, but in snowy regions a typical roof is inclined at 27 degrees in order to prevent too much snow from building up after a storm. the steeper angle forces the snow to slide off as it accumulates. suppose a ball were placed at the top of each roof and released such that it had a speed of 4.5 m/s when it reached the edge. which roof’s ball would land farther from the house?
given that the height of the edge of the roof is 3.2 m, verify your answer to part a and then calculate exactly how much farther your chosen ball would land. determine the impact velocity, including angle, of the ball which rolled off the steeper roof.

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 710 n/m. it is initially at rest on an inclined plane that is at an angle of θ = 23° with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is μk = 0.19. in the initial position, where the spring is compressed by a distance of d = 0.16 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. a) what is the block's initial mechanical energy? b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

Astudent wears sunglasses to her read a book more easily which wave interaction occurs as light passes from the air into the plastic lenses? a polarization b.refraction c.diffraction d. interference