Until a train is a safe distance from the station it must travel at 5 m/s. Once the train is on open track it can speed up to
45 ms. If it takes a train 8 seconds to reach 45 nys, what is the acceleration of the train? (Round your answer to the
nearest whole number)
4 m/s?
5 m/s2
6 m/s2
7 m/s?

How many times did thomas edison mess up the light bulb

Which best describes the difference between internal and thermal energy?

Abasketball star covers 2.65 m horizontally in a jump to dunk the ball. his motion through space can be modeled precisely as that of a particle at his center of mass. his center of mass is at elevation 1.02 m when he leaves the floor. it reaches a maximum height of 1.90 m above the floor and is at elevation 0.910 m when he touches down again. (a) determine his time of flight (his "hang time"). (b) determine his horizontal velocity at the instant of takeoff. (c) determine his vertical velocity at the instant of takeoff. (d) determine his takeoff angle. (e) for comparison, determine the hang time of a whitetail deer making a jump with center-of-mass elevations yi = 1.20 m, ymax = 2.45 m, and yf = 0.750 m.