- #1
rhxoehwhfh
- 91
- 0
1.Dubbie is moving directly along a normal line toward a plain mirror at a speed of 3.5 m/s, what is the speed of the image relative to Dubbie?
2. What is the speed of the image, relative to Dubbie, if Dubbie walk away from the mirror surface at 3.5 m/s at an angle of 300 to the mirror surface?
First answer is 3.5m/s*2 which is 7m/s right?...
but next question I just don't get it... what kind of formula do I have to use?...
can some one please help me T.T
2. What is the speed of the image, relative to Dubbie, if Dubbie walk away from the mirror surface at 3.5 m/s at an angle of 300 to the mirror surface?
First answer is 3.5m/s*2 which is 7m/s right?...
but next question I just don't get it... what kind of formula do I have to use?...
can some one please help me T.T