A curved portion of highway has a radius of curvature of 65 m. As ...

[lindiwe]

A curved portion of highway has a radius of curvature of 65 m. As a highway engineer, you want to bank this curve at the proper angle for a steady speed of 22 m/s.
 
  (a) What banking angle should you specify for this curve? (b) At the proper banking angle, what normal force and what friction force does the highway exert on a 750-kg car going around the curve at the proper speed?

Question 2

A -7.0-C point charge has a positively charged object in an elliptical orbit around it.
 
  If the mass of the positively charged object is 1.0 kg and the distance varies from 5.0 mm to 20.0 mm between the charges, what is the maximum electric potential difference through which the positive object moves?
  (k = 1/40 = 8.99  109 N  m2/C2)
  A) 9.4 MV
  B) 3.2 MV
  C) 4.2 MV
  D) 16 MV

[Jadwiga9]

Answer to Question 1

(a) 37 (b) 9200 N (normal force), 0 N (friction)

Answer to Question 2

A

[lindiwe]

Gracias!

[samiel-sayed]

Wow, this really help