When a certain simple pendulum is set swinging, its angular ...

[cookcarl]

When a certain simple pendulum is set swinging, its angular displacement  as a function of time t obeys the equation  = 8.5 cos(2.4 s-1t). How long is the pendulum?
 
  What will be an ideal response?

Question 2

The mass of Earth is 9.31 times the mass of Mars, and the radius of Earth is 1.88 times the radius of Mars. The escape speed for Mars is what percent of the escape speed for Earth?
 
  A) 222
  B) 22.5
  C) 44.9
  D) 66.2
  E) 20.2

[missalyssa26]

Answer to Question 1

1.7 m

Answer to Question 2

C

[cookcarl]

Thank you!

[missalyssa26]

Always glad to help...