Computer Intensive Physics 211


InfoMall Homework #7 -Printed only (10 points)

Spring, 1998


Due 2/5/98

IFHW7:
Using the InfoMall
Derive an expression and solve two problems, and print it out to hand in
on Thursday, February 5th, at the beginning of class. Use the InfoMall as
a reference.

  • (a) (4 pts)Derive the expression for the force necessary to act on a moving object to
    make it exhibit uniform circular motion. Explain your derivation. If you rely on a
    reference, give its citation.
  • (b) (3 pts) A 10 kg object moves with uniform circular motion in a circle of radius 2
    m in the x-y plane. It takes the object 4 seconds to go around the circle
    once. Assume it is a the point (2, 0) at t = 0.


(i)What is the force of the object at t = 1 second?


(ii)What is the acceleration of the object at t = 2 seconds?


(iii)What is the velocity of the object at t = 3 seconds?

IMAGE imgs/IFHW7.101.gif