AP (Advanced Placement) Physics(BC): Questions 97  100 of 921
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Question number: 97
» Force and Newton's Law of Motion
Question
A box is pulled across a level floor with a constant horizontal force of , so that it accelerates uniformly at . Determine the friction force exerted by the floor on the box.
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Choice (5)  Response  

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b. 


c. 


d. 


e.  None of the above 

Question number: 98
Question
An acrobat performs the “trick” of walking on a loose board laid on top of a flat roof so that one third of the board’s length extends beyond the edge of the roof. If the length of the board is , the mass of the board is , and the mass of the acrobat is , how far beyond the edge of the roof can he stand safely on the board?
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Choice (5)  Response  

a. 


b. 


c. 


d. 


e.  All of the above 

Question number: 99
» Force and Newton's Law of Motion
Question
A spring is compressed a distance of from its rest position and held in place while a ball is attached at its end. When the spring is released, the ball leaves the spring traveling with speed . What is the spring constant?
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Choice (5)  Response  

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e.  Question does not provide sufficient data or is vague 

Question number: 100
» Kinematics in One and Two Dimensions
Question
Consider a ball is kicked such that it starts projectile motion with velocity at an angle of above the ground. If the ball is taking to reach again the ground, then what is the maximum height from ground reached by the ball during this motion?
(Take: )
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Choice (5)  Response  

a. 


b. 


c. 


d. 


e.  All of the above 
