2007-08-17 03:41:39 · 7 answers · asked by ayecajoy 1 in Science & Mathematics ➔ Physics
Possibly when its falling and has the acceleration of gravity. -9.8M/s2
2007-08-17 03:50:35 · answer #1 · answered by Joe 2 · 0⤊ 0⤋
Let's say you're driving uphill in a car with a standard transmission. You stop at a stop sign. When you release the brake the car starts rolling backward slightly. As you apply the accelerator and release the clutch a forward force is generated. At the instant when car stops rolling backward and begins to move forward it's speed is zero, but it has definite acceleration.
2007-08-17 10:58:26 · answer #2 · answered by jsardi56 7 · 1⤊ 0⤋
The car will have acceleration rolling down a hill, but the tire that at the point of contact will have zero velocity. It is called Instantaneous Center of Zero Velocity. The following link will explain it.
2007-08-17 12:07:45 · answer #3 · answered by Tony M 4 · 0⤊ 0⤋
If you are driving up a hill and pop the transmission into neutral, the car will slow down, stop and roll backward. At the instant it changes from rolling forward to rolling backward its speed will be zero but it will be accelerating (backwards, down the hill).
2007-08-17 10:52:39 · answer #4 · answered by poorcocoboiboi 6 · 2⤊ 0⤋
if the car crashes into a wall, at the moment of impact, the car is not moving, but has great force on it.
anytime there's the moment of a change of direction, when there's no motion, but a change of direction, that's acceleration.
2007-08-17 10:59:21 · answer #5 · answered by Anonymous · 0⤊ 1⤋
sitting at the curb, a car still is being accelerated at 9.8m/s^2. The fact it is not moving is not relevant.
2007-08-17 11:12:35 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Prehaps in reverse, by the standard of human perception.
If it's falling off a cliff.
2007-08-17 10:47:45 · answer #7 · answered by Anonymous · 0⤊ 0⤋