5. A wagon, initially traveling at a constant 1.5 m/s, starts going down a hill that creates an acceleration of 1.0 m/s. What is the wagon's velocity 2.8 s after it starts accelerating
down the hill?

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

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.