Which is not an example of acceleration?
a) A person jogging at 3m/s along a winding path
b) A car stopped at stop sign
c) A cheetah running 27m/s east
d) A plane taking off
Good
b) A car stopped at a stop sign
To determine which is not an example of acceleration, let's first understand what acceleration means. Acceleration is the change in velocity over time. Velocity is the speed of an object in a given direction.
a) A person jogging at 3m/s along a winding path: This is an example of acceleration because the person is likely changing direction while jogging, even if they maintain a constant speed.
b) A car stopped at a stop sign: This is not an example of acceleration because the car is at rest, meaning it has zero velocity. There is no change in velocity or speed.
c) A cheetah running 27m/s east: This is an example of acceleration because the cheetah is moving in a specific direction and likely changing its velocity over time.
d) A plane taking off: This is a clear example of acceleration because the plane is starting from a stationary position and gradually increasing its speed and velocity over time.
Therefore, the answer is b) A car stopped at a stop sign because it does not involve any change in velocity or acceleration.