Introduction to Force

Question 1

push or pull exerted on an object.

Answer 1

force

Question 2

the measurement scientist use to measure force.

Answer 2

newton

Question 3

the speed of something in a given direction.

Answer 3

velocity

Question 4

the rate of change of velocity changes over time.

Answer 4

acceleration

Question 5

the frictional force air exerts against a moving object.

Answer 5

air resistance

Question 6

active and reactive forces of attraction

Answer 6

gravity

Question 7

how long a (self-)launched object stays in the air

Answer 7

hang time

Question 8

an object in projectile motion dictates the range, height, and time of flight of that object.

Answer 8

launch angle

Question 9

the path that a moving object follows through space as a function of time

Answer 9

trajectory

Question 10

a quantity that has both magnitude and direction. It is typically represented by an arrow whose direction is the same as that of the quantity and whose length is proportional to the quantity’s magnitude.

Answer 10

vector

Question 11

a form of motion experienced by an object or particle that is thrown near the Earth’s surface and moves along a curved path under the action of gravity only (in particular, the effects of air resistance are assumed to be negligible).

Answer 11

projectile motion