You are roller-skating at 4 m/s west, and your friend is -skating at 4 m/s s east. What is your friend's velocity relative you?

How much force must a locomotive exert on a 12840-kg boxcar to make it accelerate forward at 0.490 m/s2?

Abucket full of water weights 4 kg and water well is 10m deep. a girl draws water from the well. it takes the girl 3 minutes to draw a bucket full of water from the well. what is the power of the girl?

Which type of basaltic lava flow has a fairly smooth