2006-10-06 17:11:43 · 7 answers · asked by goofygyrl26 1 in Science & Mathematics ➔ Physics
Your question is not clear enough but the answer could be either depending on where the observer is and your points of reference for the velocity and the speed.
If you place a car on a train then the car's velocity as perceived by someone sitting by the track will be the train's speed although the car's speedometer will obviously show zero.
Everything is relativistic! (This does not mean I approve Einstein's theory 100% though)
2006-10-06 17:24:22 · answer #1 · answered by juliepelletier 7 · 0⤊ 1⤋
I don't understand the question. But suppose that the velocity is described by a parabola. There is an instant where the velocity is zero. But unless you choose your endpoints symmetrically around that point, the average velocity in the interval will not be zero.
2006-10-06 17:44:08 · answer #2 · answered by Anonymous · 0⤊ 1⤋
It depends on when you start the test for average speed. if you stop the car, began the test and it doesn't move it is zero speed in relation to the earth or you. If the car is moving at 10 miles an hour is immediately stopped (while testing) your speed is 10 miles an hour. In two hours it still is 10 miles an hour becuase nothing has changed as you are stopped. If you are drive for 1 hour at 10 miles an hour you have traveled 10 miles. in 2 hours you still have traveled only 10 miles so your speed average for the total hours is only 5 miles per hour to get 10 miles away .I fyou are thinking in relations of the earth to space you and the car are motionless traveling at 25,000 miles an hour. Your miles per hour on earth doens't count in space as you would move away form the planet if it did.
2006-10-06 17:27:40 · answer #3 · answered by Anonymous · 0⤊ 1⤋
YES!
Average Velocity is nothing more than net displacement divided by time of travel. Hence, the following brain teasers,
1. (Average velocity) You go on a 100-mile round-trip traveling 60 m.p.h. What is average velocity? It's ZERO!
2. (Average speed) You go on a 100-mile (one-way) trip traveling 60 m.p.h. on the way there, and light-speed on the way home. What is your average speed? It's 120 m.p.h!
2006-10-06 18:28:47 · answer #4 · answered by entropy 3 · 0⤊ 1⤋
not at all possible. speed is the magnitude of velocity.if magnitude is 0 then vector must be 0
2006-10-06 18:15:51 · answer #5 · answered by raghavan 1 · 1⤊ 1⤋
When its stopped at a red light?
2006-10-06 17:19:02 · answer #6 · answered by Lloyd 5 · 1⤊ 0⤋
no
2006-10-06 17:19:01 · answer #7 · answered by Alexander 2 · 1⤊ 1⤋