If an electric train is moving north at 100mph and a wind is blowing to the west at 10mph, which way does the smoke blow?

Matt is driving down 7th street. he drives 150 meters in 18 seconds. assuming he does not speed up or slow down, what is his speed?

Alfred pushes on a heavy box, but cannot move it. the box has a lot of inertia motion friction gravity

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .