Freshman Physics Questions
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Freshman Physics Questions

[From: ] [author: ] [Date: 11-12-17] [Hit: ]
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1) An object falls freely from rest on a planet where the acceleration due to gravity is 40 m/s/s. After 20 seconds it falls a distance of........................
2) It takes 15 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft
3) If a car increases it's velocity from zero to 100km/h in 10 seconds, its acceleration is.......

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1) ∆y=1/2*a*t^2 = 40*20^2/2 = 8 000 m

2) ∆y=1/2*g*t^2 = 9.81*15^2/2 = 1 103.625 m

3) v = a*t => a = v/t = 100/10 = 10 km/h^2 = 277 m/s^2
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