Two horizontal curves on a bobsled run are banked at the same ...

[jazziefee]

Two horizontal curves on a bobsled run are banked at the same angle, but one has twice the radius of the other. The safe speed (no friction needed to stay on the run) for the smaller radius curve is V.
 
  Therefore, the safe speed on the larger radius curve is A) 0.71 V.
  B) 0.10 V.
  C) 1.4 V.
  D) 0.5 V.
  E) 2. V.

Question 2

Vector is 75.0 cm long and points at 30 above the positive x axis. Vector is 25.0 cm long and points along the negative x axis. Vector is 40.0 cm long and points at 45 below the negative x axis.
 
  (a) Determine the x and y components of Vector .
  (b) Determine the x and y components of Vector .
  (c) Determine the x and y components of Vector .
  (d) Determine the sum of these three vectors in terms of components.
  (e) Determine the sum of these three vectors in terms of magnitude and direction.

[lauravaras]

Answer to Question 1

C

Answer to Question 2

(a) Ax = 65 cm, Ay = 38 cm
(b) Bx = -25 cm, By = 0
(c) Cx = -28 cm, Cy = -28 cm
(d) Rx = 12 cm, Ry = -10 cm
(e) 16 cm at 40 below x axis