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Can you cite an example in which the acceleration of a boby is opposite in direction to it's velocity?
When an object is thrown upward, the acceleration due to gravity acts downward while the velocity is directed upward. This leads to a decrease in the speed of the object until it reaches its highest point and changes direction.
Is it true when velocity decreases and acceleration arrows point in the same direction?
No, when velocity decreases and acceleration arrows point in the same direction, it means the object is speeding up in the negative direction.
Can an object have velocity and acceleration vectors that point in opposite directions?
Yes it can, and it's really easy. -- A stone tossed upward, before it peaks and starts falling, has upward velocity and downward acceleration. -- A car driving east and slowing for a stop-sign has eastward velocity and westward acceleration.
Is it possible that the velocity of an object be in direction other than the direction of acceleration?
Yes. For example, if you throw a ball straight up in the air, it has a positive initial velocity, but the acceleration due to gravity is in the other direction. From your perspective, until the point when it starts coming back down it will be "decelerating" but really that's just acceleration in the opposite direction of the velocity.
Can two directions of velocity of an object change when acceleration is constant?
An object can have only one velocity at any point in time. That velocity can have components in two (or more) directions.If acceleration is constant (but non-zero), then the velocity in any direction other than perpendicular to the direction of the acceleration must change.
Can you cite an example in which the acceleration of a boby is opposite in direction to it's velocity?
When an object is thrown upward, the acceleration due to gravity acts downward while the velocity is directed upward. This leads to a decrease in the speed of the object until it reaches its highest point and changes direction.
Is it true when velocity decreases and acceleration arrows point in the same direction?
No, when velocity decreases and acceleration arrows point in the same direction, it means the object is speeding up in the negative direction.
Can an object have velocity and acceleration vectors that point in opposite directions?
Yes it can, and it's really easy. -- A stone tossed upward, before it peaks and starts falling, has upward velocity and downward acceleration. -- A car driving east and slowing for a stop-sign has eastward velocity and westward acceleration.
Is acceleration always in the same direction as the unbalanced force?
No, acceleration is change in velocity. (And velocity is speed in a certain direction.) If an object slows down, then it is changing velocity and thus accelerating. (In this case, the acceleration is negative.) If an object changes direction, then it's velocity changes, so this is also acceleration. (This is centripetal acceleration.)
Can two direction of velocity of an object change when acceleration is constant?
An object can have only one velocity at any point in time. That velocity can have components in two (or more) directions.If acceleration is constant (but non-zero), then the velocity in any direction other than perpendicular to the direction of the acceleration must change.
Is it possible that the velocity of an object be in direction other than the direction of acceleration?
Yes. For example, if you throw a ball straight up in the air, it has a positive initial velocity, but the acceleration due to gravity is in the other direction. From your perspective, until the point when it starts coming back down it will be "decelerating" but really that's just acceleration in the opposite direction of the velocity.
Can two directions of velocity of an object change when acceleration is constant?
An object can have only one velocity at any point in time. That velocity can have components in two (or more) directions.If acceleration is constant (but non-zero), then the velocity in any direction other than perpendicular to the direction of the acceleration must change.
What does a tangent to a velocity-time graph measure?
It will measure acceleration in the direction towards or away from the origin.
What is slope of velocity v time graph?
The slope of a velocity vs. time graph represents acceleration. A positive slope indicates acceleration in the positive direction, a negative slope indicates acceleration in the negative direction, and a horizontal line indicates constant velocity.
Why is the velocity of accelerated body may be zero?
The velocity of an accelerated body may be zero when it temporarily stops moving at a specific point during its acceleration process. This can happen if the body changes direction or experiences a deceleration that causes its velocity to drop to zero before changing again to increase its velocity in the opposite direction.
Where does the direction of the acceleration arrow point in?
The direction of the acceleration arrow points in the direction of the acceleration vector, which indicates the rate of change of an object's velocity. If the arrow is pointing upwards, it means the acceleration is in the positive y-direction; if it's pointing left, it means the acceleration is in the negative x-direction, and so on.
Is there any point along the path of projectile where velocity and acceleration vectors are parallel to each other?
Yes, at the highest point of the projectile's trajectory, the velocity and acceleration vectors are parallel to each other. This is because the velocity is momentarily zero, and the acceleration due to gravity is acting vertically downward, pointing in the same direction as the velocity.
