A 5.6 g experimental dart is fired into a block of wood with a mass of 24.6 g. The wood block is initially at rest on a 2.8 m tall post. After the collision, the wood block and dart land 2.9 m from the base of the post. Find the initial speed of the dart. Answer in units of m/s.

Aturntable a is built into a stage for use in a theatrical production. it is observed during a rehearsal that a trunk b starts to slide on the turntable 10 s after the turntable begins to rotate. knowing that the trunk undergoes a constant tangential acceleration of 0.31 m/s2, determine the coefficient of static friction between the trunk and the turntable.

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.