Athin, uniform, metal bar, 3.00 m long and weighing 90.0 n , is hanging vertically from the ceiling by a frictionless pivot. suddenly it is struck 1.60 m below the ceiling by a small 3.00-kg ball, initially traveling horizontally at 10.0 m/s . the ball rebounds in the opposite direction with a speed of 5.00 m/s. find the angular speed of the bar just after the collision? why linear momentum not conserved?

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

The amount of potential energy possessed by an elevated object is equal to