1. A rocket becomes progressively easier to accelerate as it travels through space. Why? (Hint: About 90% of the mass of a newly launched rocket is fuel.) 2. As you are leaping upward from the ground,...

1. A rocket becomes progressively easier to accelerate as it travels through space. Why? (Hint: About 90% of the mass of a newly launched rocket is fuel.)

2. As you are leaping upward from the ground, how does the force you exert on the ground compare with your weight?