A firecracker sits on the concrete and explodes into two pieces that fly away from each other. the first piece has a mass of l kg and is moving at -30 m/s if the second piece has a mass of 3 kg how fast will it move after the explosion

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

It can take some of those large , industrial vehicles up to feet to stop when traveling only 60 mph, and therefore , you shoukd be mindful to not be jn the traffic right in front of them a. 100 feet b. 200 feet c. 335 feet d. 425 feet

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?