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acceleration is changes in speed slowing down and speeding up.
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∙ 8y ago
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What happnd to the force and acceleartion if the mass is constant?
In that case, the force is proportional to the acceleration.
What is the triangle with an exclamation point on BMW 328i dashboard?
That's your DSC (digital stability control). It's the traction control system. It comes on under hard acceleartion if your tires begin to spin and it slows down the speed of the drive wheels if slippage is sensed by the computer.
Why does a five pound weight fall faster than a two pound weight?
It does not, so the question is based on nonsense. Galilieo is said to have demonstrated it by dropping different weights from the Leaning Tower of Pisa. While he most likely did prove that acceleartion due to gravity is constant, that method is now considered an urban myth.
Does an object that is moving in a linear path with an acceleration in the direction opposite to the motion have a decreasing velocity?
No. Acceleration is Delta-Velocity / Delta-Time. If Acceleration is negative then that means that either Delta Velocity is negative or Delta Time is negative---which is not practical. For Acceleartion to be negative, that means the Velocity has to Decrease. (where Delta Velocity is change in Velocity or V2 - V1)
Is there any point along the path of projectile where velocity and acceleration vectors are perpendicular to each other?
Using the term "trajectory" implies that the acceleration you are concerned about is due to gravity. Gravity will always be perpendicular to the surface. Unless the trajectory begins perpendicular to the surface, it will never change to become perpendicular and the velocity will never be in a direction parallel to the acceleration. If it starts perpendicular to the surface it will start and remain perpendicular. Of course if you have another force acting on the object - such as wind - the component of the velocity vector parallel to the ground could be reduced to zero and at that point the only remaining component of the velocity vector would be that perpendicular to the ground and parallel to the acceleration. Likewise if the object is being propelled by an engine or rocket, the trajectory could be parallel to the force any time the acceleration vector became parallel to the velocity vector.
