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Ch 02: Motion Along a Straight Line

Chapter 2, Problem 2

An egg is thrown nearly vertically upward from a point near the cornice of a tall building. The egg just misses the cornice on the way down and passes a point 30.0 m below its starting point 5.00 s after it leaves the thrower's hand. Ignore air resistance. (d) What are the magnitude and direction of its acceleration at the highest point?

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Welcome back, everybody. We have a tennis player who is sitting on top of a cliff and he hits a tennis ball that travels upwards and then goes downwards. Now, the time for this entire trip, we are told is six seconds and we are tasked to find what is the acceleration on the ball at the highest point right here. Now, since we are neglecting air resistance or air resistance is negligible, this ball is in freefall, meaning that the acceleration acting on it at all times is equal to the acceleration due to gravity, which is equal to negative 9.81 m per second squared. Now, gravity is always going to pull whatever object we have down towards the earth. So this is going to be 9.81 m per second squared. And we can just make this positive since we have denoted that it is going downward. This corresponds to our final answer of d Thank you guys so much for watching. Hope this video helped. We will see you all in the next one.
Related Practice
Textbook Question
An egg is thrown nearly vertically upward from a point near the cornice of a tall building. The egg just misses the cornice on the way down and passes a point 30.0 m below its starting point 5.00 s after it leaves the thrower's hand. Ignore air resistance. (a) What is the initial speed of the egg?
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Textbook Question
An egg is thrown nearly vertically upward from a point near the cornice of a tall building. The egg just misses the cornice on the way down and passes a point 30.0 m below its starting point 5.00 s after it leaves the thrower's hand. Ignore air resistance. (b) How high does it rise above its starting point?
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Textbook Question
An egg is thrown nearly vertically upward from a point near the cornice of a tall building. The egg just misses the cornice on the way down and passes a point 30.0 m below its starting point 5.00 s after it leaves the thrower's hand. Ignore air resistance. (c) What is the magnitude of its velocity at the highest point?
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Textbook Question
A large boulder is ejected vertically upward from a volcano with an initial speed of 40.0 m/s. Ignore air resistance. (b) At what time is it moving at 20.0 m/s downward?
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Textbook Question
A large boulder is ejected vertically upward from a volcano with an initial speed of 40.0 m/s. Ignore air resistance. (c) When is the displacement of the boulder from its initial position zero?
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Textbook Question
A large boulder is ejected vertically upward from a volcano with an initial speed of 40.0 m/s. Ignore air resistance. (d) When is the velocity of the boulder zero?
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