A [mw] kg block of wood sits on a frictionless table. A [mb]…

A [mw] kg block of wood sits on a frictionless table. A [mb] g bullet, fired horizontally, goes completely through the block, emerging at a speed of [vbf] m/s. You measure the speed of the block after the bullet exits and find it to be [vwf] m/s. What was the initial speed of the bullet in m/s?

A block is sliding along a frictionless surface at [v1] m/s….

A block is sliding along a frictionless surface at [v1] m/s. A second block with a mass of [m2] kg, sliding at a faster speed of [v2] m/s, collides with the first from behind and sticks to it. The final velocity of the combined blocks is [vf] m/s. What is the mass of the slower first block in kg?

A person is sledding down a hill. The combined mass of the p…

A person is sledding down a hill. The combined mass of the person and sled is [m] kg. The hill is [h] m high with a [d] m long slope. There is a [F] N drag force due to air resistance. If the person and sled are moving at [v] m/s at the bottom of the hill, what was their initial velocity at the top of the hill?

A person uses a [F] N force to pull a child in a wagon up a…

A person uses a [F] N force to pull a child in a wagon up a hill. The combined mass of the child and wagon is [m] kg. The hill is [h] m high vertically and [d] m long along the slope. If the child and wagon are moving at [v] m/s at the top of the hill, how fast were they moving initially before climbing the hill?