Arod of length l is pivoted about its left end and has a force f applied perpendicular to the other end. the force f is now removed and another force f' is applied at the midpoint of the rod. if f' is at an angle of 30° with respect to the rod, what is its magnitude of the resultant torque is the same as when f was applied

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?

Of is j/kg·k. if a 2.6 kg of isk to k, is ?

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. it strikes a red glider that has mass 0.600 kg and that is initially at rest. after the collision, the blue glider is moving to the left with a speed of 3.00 m/s.(a) what are the magnitude and direction of the velocity of the red glider after the collision? (b) is this collision elastic?