Ken is sitting in a bumper cart with a mass of 25 kg. When he hears the signal, he pushes on the pedal and reaches a maximum speed of 5 m/s and bumps into another bumper cart. What is the calculated force that he receives upon collision?

Aweight lifter raises a 1600 n barbell to a height of 2.0 meters. how much work was done? w = fd question 6 options: 3000 joules 30 joules 320 joules 3200 joules

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve