# Physics

posted by .

A 2.40 kg mass, m, on a frictionless table is moving in a circle with radius 0.500 m at a constant speed. m is attached to a 5.70 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay at rest

• Physics -

I'm in this class too :/

For this problem, you have to use both equations F=Ma and F=(mv^2)/r

Step 1: solve for F using F=Ma
5.70kg x 9.81 m/s^2 = 55.917 N

Step 2: plug this into the other equation
55.917N = (2.40kg x v^2)/0.500m
(55.917N x .5m)/2.40kg
=11.65 m^2/s^2
(squareroot)11.65 = 3.41 m/s

## Similar Questions

1. ### Physics

A puck of mass m = 1.26 kg slides in a circle of radius r = 25.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.04 kg by a cord through a hole in the table. What speed keeps the cylinder at rest?
2. ### physics

A puck of mass m = 1.5 kg slides in a circle of radius r = 20 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.5 kg by a cord through a hole in the table. What is the speed of mass m that keeps the cylinder …
3. ### Physics

A puck of mass m = 1.10 kg slides in a circle of radius r = 24.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.00 kg by a cord through a hole in the table. What speed (in m/s) keeps the cylinder at rest?
4. ### physics

A mass of 0.04 kg is attached to a cord passing through a small hole in a frictionless, horizontal surface. The mass is initially orbiting with speed 4.9 m/s in a circle of radius 0.4 m. The cord is then slowly pulled from below, decreasing …
5. ### Physics

A 3.50 kg mass, m, on a frictionless table is moving in a circle with radius 0.420 m at a constant speed. m is attached to a 6.40 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay …
6. ### Physics

A 3.50 kg mass, m, on a frictionless table is moving in a circle with radius 0.420 m at a constant speed. m is attached to a 6.40 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay …
7. ### physics

A mass m1 = 6.0 kg sits on a frictionless table, and rotates at a constant speed v = 3.0 m/sin a circle of radius R = 1.5 m. m1 is attached by a massless string which passes through a hole in the centre of the table to a second m2 …
8. ### Physics

A 4.10 kg mass, m, on a frictionless table is moving in a circle with radius 0.390 m at a constant speed. m is attached to a 5.00 kg mass, M, by a cord through a hole in the table. Find the speed with which m must move for M to stay …
9. ### Physics

A mass of 0.475 kg, on a frictionless table, is attached to a string which passes through a hole in the table. The hole is at the center of a horizontal circle in which the mass moves with constant speed. The radius of the circle is …
10. ### physics

A puck of mass m = 1.90 kg slides in a circle of radius r = 16.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.70 kg by a cord through a hole in the table. What speed keeps the cylinder at rest?

More Similar Questions

Post a New Question