Dr. Kibble is monitoring the position of a meteoroid as it approaches planet Earth. He observes it through a telescope every 5.0 minutes and records its position in the table below.
Time (min) Distance from Earth (km)
0.0
18,000
5.0
15,000
10.0
12,000
15.0
9,000
Which of the following could be the graph of the meteoroid's remaining distance to Earth through time?

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?

Which articulations allow for greatest range of motion?