A 0.350 kg ball of clay is thrown and sticks to a 1.2 kg block of wood initially at rest on a horizontal frictionless surface. If the clay was initially moving toward the wood with a speed of 25 m/s, then calculate the speed of the clay-block system following their collision.

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?