Chap 4b - Relative Motion

Question 1

Reference Frame

Answer 1

A coordinate system in which an experimenter makes position and time measurements of physical events.

Question 2

Inertial Reference Frame

Answer 2

A reference frame that is moving at a constant speed in a straight line.

(it is not accelerating)

Question 3

True or false…

In an inertial reference frame, you can often feel your motion.

Answer 3

False!

If you were truly moving at a constant velocity, there is no way you could tell you were not stationary.

(By the way, stationary is a relative term, so you should be questioning its meaning a bit and if it was actually used properly above.)

Question 4

If “r” stands for “the road”
and “j” stands for “John”
then what does this mean?

Answer 4

The velocity of the road relative to John.

Question 5

If “r” stands for “the road”

and “j” stands for “John”

then what does this the symbol below mean?

Answer 5

The velocity of the John relative to the road.

Question 6

If “r” stands for “the road”

and “k” stands for “Kevin”

then what does this the symbol below mean?

Answer 6

The velocity of the Kevin relative to the road.

Question 7

Answer 7

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

If “Y” stands for Yoda, “L” stands for Luke, and “T” stands for the terrain, then what does the following mean?

Answer 11

The velocity of Luke relative to Yoda.

Question 12

If “Y” stands for Yoda, “L” stands for Luke, and “T” stands for the terrain, then what does the following mean?

Answer 12

The velocity of Yoda relative to Luke.

Question 13

If “Y” stands for Yoda, “L” stands for Luke, and “T” stands for the terrain, then what does the following mean?

Answer 13

The velocity of Yoda relative to the terrain.

Question 14

If “Y” stands for Yoda, “L” stands for Luke, and “T” stands for the terrain, then what does the following mean?

Answer 14

The velocity of Luke relative to the terrain.

Question 15

If “Y” stands for Yoda, “L” stands for Luke, and “T” stands for the terrain, then what does the following mean?

Answer 15

The velocity of the terrain relative to the Luke.

Question 16

If “Y” stands for Yoda, “L” stands for Luke, and “T” stands for the terrain, then what does the following mean?

Answer 16

The velocity of the terrain relative to the Yoda.

Question 17

Answer 17

Question 18

Answer 18

Question 19

Answer 19

Question 20

Answer 20

Really…

Well, you’d have to put it on coordinate axes and then use the pythagorean theorem and stuff, and figure out the angle and stuff. I could do it, but not so much on a flash card….

I mean, clearly its northwest a bit, and probably a bit faster than 45 km/hr… but….

Question 21

Answer 21

Question 22

Answer 22

Question 23

Answer 23

Question 24

Relative Motion

Answer 24