The motion of a car on a position-time graph is represented with a horizontal line. what does this indicate about the car’s motion?

it’s not moving.

it’s moving at a constant speed.

it’s moving at a constant velocity.

it’s speeding up.

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

One number is said to be an "order of magnitude" larger than another number if choose one: a. it is 10 times larger. b. it is 5 times larger. c. it is 3 times larger. d. it is 100 times larger. e. it is 2 times larger.

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?