ch 4 motion in a circle

Question 1

speed

Answer 1

is a distance divided by time an is a scalar quantity

Question 2

velocity

Answer 2

is a displacement divided by time and is a vector quantity

Question 3

frequency

Answer 3

how many revolutions, or cycles, are completed in one second

Question 4

period

Answer 4

how long one complete revolution takes in seconds

Question 5

uniform circular motion

Answer 5

refers to the constant speed of an object as i movs in a circular path

Question 6

average velocity

Answer 6

is the displacement of an object divided by the time taken

Question 7

instantaneous velocity

Answer 7

is the velocity at one instant in time, or when the time taken to move a certain displacement is very small

Question 8

centripetal force

Answer 8

the resulting force that causes an object of a mass, m, to move in a circle of radius, r, with a velocity v

Question 9

centripetal acceleration

Answer 9

the resulting or net acceleration of a body that is moving in a circle of radius, r, with a velocity v