Physics

Physics, 18.09.2019 23:00, josephgperez

Arock is dropped from a bridge to the water below. it takes 3.2 s for the rock to hit the water. find the speed (in m/s) of the rock as it hits the water. how high (in m) is the bridge above the water

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Physics, 02.08.2019 21:30, Werkrat2756

Arock is dropped off the side of a bridge and hits the water below 2 seconds later. (a) what was the rock's velocity when it hit the water? (b) what was the rock's average velocity as it fell? (c) what is the height of the bridge above the water?

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Physics, 28.09.2019 19:50, ParkBecca

Arock is thrown down with an initial speed of 10.0 m/s from a bridge in the water. it takee 2.75 s for the rock to hit the water. what is the speed of the rock as it hits the water? how high is the bridge above the water?

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Mathematics, 30.09.2019 10:00, Naysa150724

1. a student drops a rock from a bridge to the water 12 m below. a) how many seconds does it take the rock to hit the water? b) how fast is the rock moving when it hits the water? 2. a weather balloon is floating at a certain height above the earth when it releases a heavy pack of instruments. a) if the pack hits the ground with a speed of 73 m/s, how far up is the balloon? b) how long does it take the instrument pack to reach the ground? 3. an engineer must design a runway that allows planes to reach a ground speed of 61 m/s before they can take off. if the planes accelerate at 2.4 m/s2 , what must be the minimum length of the runway? 4. a rock is thrown straight down, not dropped, from the roof of a building that is 61 m above the ground. if it takes 3.1 s to reach the ground, with what speed was it thrown? © 2004, gpb 3-21 5. a baseball is hit straight up into the air with a speed of 33 m/s. a) how high does it go? b) how long is it in the air? 6. an astronaut drops a feather from 1.25 m above the surface of the moon. the acceleration due to gravity on the moon is 1.62 m/s2 . a) how long does it take the feather to hit the ground? b) how long would it take a hammer to fall the same distance? 7. a tennis ball is dropped 1.2 m above the ground. with what velocity does it hit the ground (before the ground stops it)?

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Arock is dropped from a bridge to the water below. it takes 3.2 s for the rock to hit the water. fin...

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