Homework Help: physics

Posted by melissa on Tuesday, November 30, 2010 at 2:13pm.

An air puck of mass m1 = 0.45 kg is tied to a string and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass m2 = 1.10 kg is attached to it. The suspended mass remains in equilibrium while the puck on the tables revolves.
A) What is the tension T in the string?
B) What is the magnitude of the horizontal force acting on the air puck?
C) What is the speed of the puck

physics - Anonymous, Wednesday, December 1, 2010 at 2:53pm
Teresa's class?
physics - Anonymous, Wednesday, January 5, 2011 at 7:56pm
sorry =[
physics - Brianna, Thursday, December 8, 2011 at 6:33pm
a)What is the tension T in the string?

in this case, tension = mass2 X gravity
so, tension = 1.10 kg X 9.8 m/s^2
tension = 10.78

For letter b, I am afraid I have no clue :(

c)What is the speed of the puck?

F = (m(v^2))/r

the tension is the force in this case, so:

tension = (m1(v^2))/r

v^2 = (tension X r)/m1

v^2 = (10.78 N X 1.0 m)/ .45 kg

v^2 = 23.95555556 m/s
Take the square root of both sides
v = 4.894441291 m/s
physics - Jake Conner, Tuesday, April 10, 2012 at 7:24pm
part a is the same as part b ;)
physics - Lisa, Thursday, November 1, 2012 at 12:14am
For B, the magnitude is simply the absolute value of what you got in part A.

Answer this Question

Related Questions

physics help please - an air puck of mass m1= 0.25 kg is tied to a string and ...
Physics - An air puck of mass 0.23 kg is tied to a string and allowed to revolve...
physics - an air puck of mass 0.347 kg is tied to a string and allowed to ...
Physics - An air puck of mass 0.289 kg is tied to a string and allowed to ...
physics - An air puck of mass 0.33 kg is tied to a string and allowed to revolve...
Physics B - An air puck of mass 0.289 kg is tied to a string and allowed to ...
AP Physics B - An air puck of mass 0.102 kg is tied to a string and allowed to ...
Physics - A string requires a 191.0 N force in order to break. A 1.75 kg mass ...
Physics - A string requires a 191.0 N force in order to break. A 1.75 kg mass is...
physics - A stone of mass 0.33 kg is tied to a string of length 0.65 m and is ...

For Further Reading

First Name:
School Subject:
Answer: