Question

3. Two balls are thrown from the top of a building 100 m high. One ball is thrown straight up at 4 m/s while the other is thrown straight down at 4 m/s. Which statement is true? (a) both balls take 4.94 s to hit the ground (b) both balls hit the ground with speed 44.5 m/s (c) both balls hit the ground with speed 44.0 m/s (d) the balls take different amounts of time to hit the ground and they hit with different speeds. (e) both balls take 4.13 s to hit the ground

          3. Two balls are thrown from the top of a building 100 m high. One ball is thrown straight up at 4 m/s while the other is thrown straight down at 4 m/s. Which statement is true?
(a) both balls take 4.94 s to hit the ground
(b) both balls hit the ground with speed 44.5 m/s
(c) both balls hit the ground with speed 44.0 m/s
(d) the balls take different amounts of time to hit the ground and they hit with different speeds.
(e) both balls take 4.13 s to hit the ground

3. Two balls are thrown from the top of a building 100 m high. One ball is thrown straight up at 4 m/s while the other is thrown straight down at 4 m/s. Which statement is true?
(a) both balls take 4.94 s to hit the ground
(b) both balls hit the ground with speed 44.5 m/s
(c) both balls hit the ground with speed 44.0 m/s
(d) the balls take different amounts of time to hit the ground and they hit with different speeds.
(e) both balls take 4.13 s to hit the ground

Added by Josefa W.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Prabhu Ramji

01/03/2022

Step 1

We can use the equation for the time it takes for an object to fall from a height h: t = sqrt(2h/g) For the ball thrown straight up, the height is 100 m and the acceleration due to gravity is -9.8 m/s^2 (negative because it is acting in the opposite direction Show more…

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3. Two balls are thrown from the top of a building 100 m high. One ball is thrown straight up at 4 m/s while the other is thrown straight down at 4 m/s. Which statement is true?Answer is B but why?! Two balls are thrown from the top of a building 100 m high.One ball is thrown straight up at 4 m/s while the other is thrown straight down at 4 m/s.Which statement is true? a both balls take 4.94 s to hit the ground (b) both balls hit the ground with speed 44.5m/s c both balls hit the ground with speed 44.0 m/s d the balls take different amounts of time to hit the ground and they hit with different speeds. Y e both balls take 4.13 s to hit the ground