Quiz 1b (09.22.2020)

Question 1

Motion of objects is always described as ______.

Answer 1

relative

Question 2

What is speed?

Answer 2

the distance covered per amount of travel time (meters per second)

Question 3

_____ speed is the total distance covered divided by the total travel time.

Answer 3

Average

Question 4

Average speed doesn’t____

Answer 4

indicate various instantaneous speeds along the way

Question 5

_____ speed is given by your spedometer and it can be quite different than your average speed when you speed up and slow down.

Answer 5

Instantaneous

Question 6

basic equation for speed

Answer 6

s = (d/t)

Question 7

basic equation for time

Answer 7

t = (d/s)

Question 8

basic equation for distance

Answer 8

d = (s*t)

Question 9

What is velocity?

Answer 9

a description of both the instantaneous speed of the object and the direction of travel

Question 10

Velocity is a ____. It has magnitude and direction; it is directed speed.

Answer 10

vector quantity

Question 11

What is constant speed?

Answer 11

steady speed, neither speeding up or slowing down.

Question 12

What is constant velocity?

Answer 12

constant speed and constant direction

Question 13

Acceleration involves_____

Answer 13

change in speed, or change in direction, OR both

Question 14

Acceleration is ________

Answer 14

change in velocity / time

Question 15

Equations for velocity

Answer 15

V = d/t &raquo_space; d = Vt

same as speed, but it would technically include direction

Question 16

Equation for final position - no acceleration

Answer 16

Xf = Xi + Vt

Question 17

Equation for acceleration

Answer 17

change in V/t

Question 18

Equation for final velocity

Answer 18

Vf = Vi + at

Question 19

Equation for final position - with acceleration

Answer 19

Xf = Xi + Vit + 1/2at^2

Question 20

What is free fall?

Answer 20

falling under the influence of gravity only - with no air resistance (on Earth, freely falling objects accelerate at about 10m/s^2)

Question 21

How do you calculate final velocity without time?

Answer 21

Vf^2 = Vi^2 + 2a(change in position)

Question 22

Equation for average velocity

Answer 22

1/2(Vi*Vf)