Recent content by lobbob

Homework Statement If a particle moves in a plane so that its position is described by the functions x=Acosωt, and y= Asinωt, it is (A) moving with varying speed along a circle (B) moving with constant speed along a circle (C) moving with constant acceleration along a straight line (D)...

Here is another part of the problem. Now you press your finger against the outer rim of the yo-yo(which has a radius of 4.0 cm) to bring it to a stop. You apply a constant force of 2.0N directed perpendicular to the rim of the yo-yo. The tension from part a) is no longer being applied to the...

I will just assume the angle is 90 deg. Do you think this is safe since it never actually states it. Thanks!

By random equations I meant equations that I never used before, but seemed they might work. v is velocity, m is mass of clay, M is mass of sphere, theta is initial angle launched at, and f just means final. So (theta)f meant final angle. I don't think there was any C. So the main reason why the...

Do you mean principles of conservation of angular momentum or energy. Also, could you start me off. I get confused with the equations. Or since this looks like a inelastic collision in two dimensions is there any handy formula? Thanks!

The torque is r*F*sin(theta)? We already know the radius and force but what is the angle. Also, what are the right units for angular acceleration. Is 3 right, just the wrong units. Thanks!

Homework Statement A ball of clay of mass m travels with velocity v in a path tangent to a disk of radius R and mass M. The clay collides with the disk tangentially to its outer rim (a totally inelastic collision) and the clay and disk begin to spin about the axis. What is the final angular...

The method I outlined was a start, then I realized it didn't work. That's why I asked for help. I think the angular acceleration of the yo-yo would be 15 rad/s=0+a*5.0s. a=3.0 rad/s. Also, could you please help me find the torque and the result for part(b). Thanks a lot! You saved my life. :)

Thanks, a lot. You can assume the yo-yo is free to fall during this 5 second time interval. So can you also help me with part b. And, for calculating the torque, what would be the distance. Thanks

Homework Statement A yo-yo is spun from rest by pulling on the string with a constant tension of 2.0 N. The radius of the inner rod on which the string is strung round is 0.50 cm. The tension is applied for 5.0 seconds after which the yo-yo is observed to spin with an angular velocity of 15...