A 72kg friend is standing still on rollerskates holding a 5.5kg watermelon. He throws the watermelon forward with a velocity of 3.3m/s. What is his recoil velocity?

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

How would a small bar magnet be oriented when placed at position x?

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little