1. Assume a scale shows the weight of a person at rest to be 600 N. The person takes the scale into an elevator and steps on it. What weight does the scale show while the person moves in the elevator upward with a constant speed of 1 m/s? (in N)

2. Two bowling balls hit each other. The mass of the first bowling ball is 2.5 times larger than the mass of the second bowling ball. If the first bowling ball exerts a force with a magnitude of 300 N on the second bowling ball, how large is the magnitude of the force that the second bowling ball exerts back on the first one? (in N)