5. A 60-kg man is in an elevator that is accelerating down- ward at the rate of 1.4 m/s2.
a. What is the true weight of the man in newtons?
b. What is the net force acting on the man required to pro-
duce the acceleration?
C. What is the force exerted on the mans feet by the floor of the elevator
D. What is the apparent weight of the man in Newton’s
E. How would your answers to part b through d change if the elevator were accelerating upward with an acceleration of 1.4 m/s2.

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)

Your science teacher brings in a speaker to talk to your class about climate change. during the session, students ask a few questions. which questions are related to the current evidence on climate change

Distinguish between linear momentum and angular momentum