Homework Help: physics

Posted by Anonymous on Sunday, October 28, 2007 at 1:34pm.

A 25kg child on a 2m long swing is released from rest when the swing supports make an angle of 30 degrees with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. (b) If the speed of the child at the lowest position is 2m/s, what is the mechanical energy lost due to friction?

(a) (9.8m/s^2)(2-2cos30)=1/2(v^2)
v=2.29m/s
(b)What am I suppose to do for b?

physics - jean, Monday, October 12, 2009 at 9:26pm
Can you tell me what kind of equation did you used to get v=2.29m/s?
I am also suffering from this kind of prob.
physics - John, Thursday, October 15, 2009 at 2:07pm
haha university of victoria assignment??? me too...

Answer this Question

Related Questions

PHYSICS - A 27.0 kg child on a 3.00 m long swing is released from rest when the ...
physics - Draw the figure, and calcuate the height above the bottom point the ...
Physics - A 40 kg child sits in a swing suspended with 2.5 m long ropes. The ...
physics - Child weighs 29 kg on a swing supported by two chains. Another child ...
Physics PLEASE HELP - A 80- kg child sits in a swing suspended with 2.6- m-long ...
PHYSICS PLEASE HELP - A 80- kg child sits in a swing suspended with 2.6- m-long ...
ap Physics - AP PROBLEM CHILD ON A SWING AN ADULT EXERTS A HORIZONTAL FORCE ON A...
physics - A child swings on a playground swing. How many times does the child ...
physics - A 350 N child is in a swing attached to rope 1.75m long. Find the ...
physics - The string in the Figure is L = 135.0 cm long and the distance d to ...

For Further Reading

First Name:
School Subject:
Answer: