A 50,000-kg train car moving at 2 m/s collides and connects to another identical car initially at rest.

11 words used to describe an object are called itsor characteristics.total12 is the amount of matter in an object.helt udedelerde elettroduodet littletadli dituntut uploaded13 the metric unit used to measure weight is them.14 if a toy has a mass of 1 kg, it has an earth weight 15 the density of liquid water isti

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?