Recent content by nathan8

Homework Statement Link AB has angular velocity and angular acceleration as shown. Determine the velocity and acceleration of point C and the angular acceleration of link BC at this instant. Express them as Cartesian vectors. https://www.physicsforums.com/attachments/41853 Homework Equations...

Homework Statement What is the tractive force F necessary between subway car A and the track to reach a speed of 100km/h in 1 minute? What distance was traveled during this time? At this point the brakes are fully applied on the wheels of car A in order to slow the train to 40km/h. The...

Would Power = F*v work here? Then just find the velocity with 2Va = -Vb And use the 25N force times this velocity? Am I on the right track with the work done on the crate, being the change in potential energy?

The weight of the bullet is 40 grams, sounds large to me as well. Will work energy equations work better here? Or am I on the right track?

Homework Statement 40-g Bullet is fired with a velocity of magnitude v0=700 m/s into a 5kg block of wood. Coefficient of kinetic friction = 0.6. a) how far will the block move b) how long after impact does it come to rest c) percentage of energy lost on impact (block has no velocity...

Homework Statement 20 Kg box is raised 0.75m by a constant 25N force applied at the end of the cord if the pulleys are massless, determine work done on the crate. What is the power delivered at the end of the cord at this point? Identical pulley system...