Concept explainers
The speed with which a friend throw the ball
Answer to Problem 83GP
Explanation of Solution
Given:
Initial velocity of the ball dropped from top of cliff
Height of the cliff
Initial position of the ball at the top of the cliff
Final position of the ball at the bottom of the cliff
Time of travel for ball dropped
Acceleration of the ball dropped
Initial velocity of the ball thrown up
Final velocity of the ball thrown up
Initial position of the ball thrown up
Final position of the ball thrown up
Acceleration of the ball thrown up
Formula Used:
Position of an object at any time in accelerated motion is given as
Acceleration is given as
Calculation:
Consider the motion of the ball dropped from the top of the cliff.
Final position of the ball dropped is given as
Substituting the values
Consider the motion of the ball thrown up by the friend.
Acceleration of the ball thrown up is given as
Substituting the values
Conclusion:
Therefore, the speed of the ball thrown by friend comes out to be
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Physics: Principles with Applications
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