Which of the examples is describing acceleration? * A roller coaster cart is stationary while passengers are loading.
A roller coaster cart slows down as it starts to climb the first hill.
A roller coaster cart is traveling at a constant speed along a straight section of the
track
None of these are examples of acceleration.

Aquarterback pedals 3.3meters southward and then run 5.7meters northward. whats the distance ? and whats the displacement?

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s. part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block