Consider the gravitational pull of the earth and acceleration due to gravity. When you throw a ball in the air, at the highest point, it is stopped and has a velocity of 0. However, if the acceleration of the ball was also 0, then the ball would not be able to come back down to the earth. In order for the ball to come back down, there must be an acceleration. This acceleration is the acceleration due to gravity which is constant at the surface of the earth at 9.8 m/s^2. Another example: Say a car is rolling down a hill backwards. In order to stop the car from rolling more, the driver accelerates. After a certain amount of time, the car will stop (with velocity of 0) and then it will start moving up the hill again. When it is stopped, the car is still accelerating in order to overcome the force of gravity pulling the car down the hill.
Technically, an object is accelerating if it's changing it's velocity. This includes speeding up, slowing down, and turning. So, yeah, if an object isn't moving at all, but is turning, it's still accelerrating.
Yes. This happens, for example, when you throw an upject directly up, and it reaches its highest point. In that case, its velocity is zero, and its acceleration is -9.8. (If it didn't have acceleration, it would stay up there.)
Acceleration is the rate of change of velocity, a=dv/dt
Therefor if a= 0 the velocity is constant or constantly the same. It can have any value however while it remains the same.
Sure. When you toss a ball up into the air, that's exactly what it has at the top
of its arc, when it runs out of upward steam and starts to move downward.
Yes. For example a swinging pendulum has zero velocity at the turning point but acceleration is not zero.
Any falling object has acceleration and velocity vectors in the same direction.
The net force is in the same direction as the acceleration of an object.
If the acceleration is constant, yes. However, the acceleration of an object can vary. The rate of change of acceleration is called jerk.
an acceleration of Zero, and a constant Inertia.
Acceleration is the rate of change of VELOCITY, not of SPEED. If the velocity changes, there is acceleration. It is enough for the direction to change.
Yes it can.
Yes. For example a swinging pendulum has zero velocity at the turning point but acceleration is not zero.
As long as acceleration is zero, the object's velocity is constant.
Any falling object has acceleration and velocity vectors in the same direction.
Absolutely. That's exactly the situation of a rubber ball that was tossed straight up, at the instant when it's at the top of its arc. Any object that's not connected to anything else and is rising or falling has constant acceleration ... the acceleration of gravity. If it was originally launched upward, then it eventually runs out of steam, stops, reverses direction, and starts moving down. At that instant during its constant acceleration, its velocity is zero.
It will increase the velocity of the the object in which the acceleration is applied.
The acceleration is the same direction of the velocity
No. Velocity is the change of location and accelarion is any change that occurs to the velocity of an object.
a = F/m, where a is acceleration, F is net force, and m is mass in kilograms.
In that case, the object speeds up.
When there is no resultant force there is no acceleration therefore the velocity will stay the same.
They all have to do with how fast an object is moving