Astudent is standing in an elevator that is
accelerating downward. the force that the
student exerts on the floor of the elevator must
be
(1) less than the weight of the student when at
rest
(2) greater than the weight of the student when
at rest
(3) less than the force of the floor on the student
(4) greater than the force of the floor on the
student

Ascientist is tracking an object orbiting the sun that is found between mars and jupiter. in order to classify the object as an asteroid, it must be at least

A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocket’s acceleration during the first 16-s? b. what is the rocket’s speed as it passes through a cloud 5100-m above the ground?

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.