AP (Advanced Placement) Physics(BC): Questions 56  58 of 921
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Question number: 56
» Gravitation and Circular Motion
Question
A car goes around a curve of radius with a constant speed . Then it goes around another curve of radius with speed . What is the centripetal acceleration on the car as it goes around the second curve, compared to the first?
Choices
Choice (5)  Response  

a.  Four times 

b.  The acceleration cannot be determined without knowing the mass of the car. 

c.  The same 

d.  Twice 

e.  Question does not provide sufficient data or is vague 

Question number: 57
Question
A ladder has a mass of and length of . As shown in the illustration, the ladder remains stable against a frictionless wall with its bottom end 1 m from the base of the wall. Rank the following: the weight of the ladder , the normal force of the wall on the ladder the normal force of the floor on the ladder and the friction force of the floor on the ladder .
Choices
Choice (5)  Response  

a. 


b. 


c. 


d. 


e.  None of the above 

Question number: 58
Question
Four charged particles: two of charge and two of charge are placed at the vertices of a square of length a. The two positive charges are placed at opposite vertices, and the two negative charges are placed at opposite vertices. What is the net electric field at the center of the square due to the four charges?
Choices
Choice (5)  Response  

a. 


b. 


c. 


d.  0 

e.  None of the above 
