Physics, 23.12.2019 21:31 lopezsharon333
You stand on a bridge above a river and drop a rock into the water below from a height of 25 m. (assume no air resistance)
a. what is the acceleration of the rock as it falls?
b. how long does it take to hit the water?
c. how much more time would it take if instead of dropping the rock straight down you threw horizontally with a speed of 20 m/s?
d. you throw another rock at an angle of 65 degrees above the horizontal with a speed of 20 m/s. what are the x- and y- components of the rock's speed?
e. how long does it take the rock to reach its maximum height?
Answers: 3
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What is the earliest point in the universe that we can observe? why can’t we see back further than this?
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The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
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The law of reflection states that the angle of reflection is equal to the angle of
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You stand on a bridge above a river and drop a rock into the water below from a height of 25 m. (ass...
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