A ball is oscillating on an ideal spring with an amplitude of 8.3 ...

[fahad]

A ball is oscillating on an ideal spring with an amplitude of 8.3 cm and a period of 4.6 s. Write an expression for its position, x, as a function of time t, if x is equal to 8.3 cm at t = 0.0 s. Use the cosine function.
 
  What will be an ideal response?

Question 2

A package is oscillating on a spring scale with a period of 4.60 s. At time t = 0.00 s the package has zero speed and is at x = 8.30 cm. At what time after t = 0.00 s will the package first be at x = 4.15 cm?
 
  A) 0.575 s
  B) 0.767 s
  C) 1.15 s
  D) 1.30 s
  E) 1.53 s

[aidanmbrowne]

Answer to Question 1

x = (8.3 cm) cos2t/(4.6 s) or x = (8.3 cm) cos(1.4 s-1)t

Answer to Question 2

B

[fahad]

Wow, this really help

[xiazhe]

YES! Correct, THANKS for helping me on my review