if it is, could you please describe the situation to me.
2007-12-04 01:52:08 · 11 answers · asked by blah 2 in Science & Mathematics ➔ Physics
the book just says:
"with respect to the motion of a car, describe a situation in which the car has zero speed but has a definite acceleration." and that leaves me all confused. 0_o
2007-12-04 02:05:35 · update #1
it isn't likely to be correct but possible, when the car may be real or a toy, is thrown up, at the point it starts coming downward, on that moment its speed is zero, but acceleration is "g"=9.8 m/s^2.
2007-12-04 03:48:04 · answer #1 · answered by peter aka gaurav. 3 · 0⤊ 0⤋
It all depends on how you quantify this. Dan says put the car on a carrier, which is a good answer, but the car is moving at the same speed as the carrier. So I wonder, do you mean with the wheels moving?
The closest I believe you will get is to put the car on the test wheels and let her rip. You have definite acceleration and your movement is limited to a slight side to side motion, but no forward or reverse speed.
Yeah, that is my final answer, on the test rollers. It is the only way.
2007-12-04 02:00:21 · answer #2 · answered by blueman 5 · 0⤊ 0⤋
Durring a head on collision. Say that it happens durring the time frame of half a second, and that it changes velocity from
35 meters/second to -5 m/s, and has a mass of 1000 kg
We can talk about the impulse that was exerted on the car durring that brief time period.
J=change in momentum
J=40*1000, or 40,000 N*s
J is also the force*time frame, so we can solve for the average acceleration.
m*a*t=40,000 N*s
a=8,000 m/s^2.
So any time you change direction very quickly, you can get enormous accelerations.
2007-12-04 02:30:46 · answer #3 · answered by Siwelttap 3 · 0⤊ 0⤋
Yes, if a car (or any body) is moving in one direction and then reverses direction, it can be undergoing constant acceleration while at the instant at which it stops and reverses direction its speed is zero. It would not be easy to accomplish this in a car, but it could be done.
2007-12-04 01:57:03 · answer #4 · answered by Charlie149 6 · 0⤊ 0⤋
Acceleration is a change in velocity. Velocity is speed in a given direction. Therefore, the car could be rotating, giving it acceleration without actually moving.
2007-12-04 02:00:25 · answer #5 · answered by Anonymous · 0⤊ 0⤋
enable's say you're using uphill in a automobile with a typical transmission. You end at a end sign. once you launch the brake the automobile starts off rolling backward particularly. As you prepare the accelerator and launch the seize a forward rigidity is generated. on the on the spot whilst automobile stops rolling backward and starts off to circulate forward it somewhat is velocity is 0, in spite of the undeniable fact that it has sure acceleration.
2016-10-02 06:23:26 · answer #6 · answered by kanosh 4 · 0⤊ 0⤋
A car just sitting there unmoving has an acceleration of 9.8 m/s/s towards the centre of the earth, due to gravity.
2007-12-04 02:17:01 · answer #7 · answered by murnip 6 · 0⤊ 0⤋
Yes, if you apply brakes to a moving car,its speed drops to zero.Then, it definitely undergoes a negative accleration or deceleration.
2007-12-04 01:58:40 · answer #8 · answered by Monica 2 · 0⤊ 0⤋
Put it on a car carrier and drive the carrier.
2007-12-04 01:55:13 · answer #9 · answered by Dan H 7 · 0⤊ 1⤋
only if the car was still and ev erything around it was reversing... sending the car forward...
Or on a belt... picture yourse;f on a treadmill
2007-12-04 01:55:42 · answer #10 · answered by Anonymous · 0⤊ 1⤋