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When is acceleration due to gravity positive and when is it negative?
Acceleration due to gravity is negative when an object is moving up. Accl'n due to gravity is positive when an object is moving down (since gravity acts downwards on an object). ^Acceleration due to gravity is always negative, while the acceleration of the ball upward was positive due to what threw it, not gravity.
Differentiate positive acceleration and negative acceleration?
A positive acceleration is a change in velocity such that the latter velocity is greater than the former velocity and is therefore going fasterwhile a negative acceleration or deceleration is a change in velocity such that the latter velocity is lesser than the former velocity and is therefore going slower.Now let us look at the equation of a uniform acceleration (the change in velocity is uniform):a = (vf-vi)/sIf the final velocity is greater, you will have a positive acceleration. If the initial velocity is greater, you will have a deceleration.
What is deceleration in physics?
Deceleration in physics refers to the rate at which an object slows down its speed or velocity. It is the negative acceleration of an object moving in the opposite direction of its velocity vector, causing it to decrease its speed. Deceleration can occur due to various factors such as friction, air resistance, or external forces acting on the object.
How is a negative acceleration different from a positive acceleration?
A negative acceleration refers to a decrease in velocity, while a positive acceleration refers to an increase in velocity. Negative acceleration occurs when the speed of an object is decreasing, such as when it is slowing down. Positive acceleration occurs when the speed of an object is increasing, such as when it is speeding up.
Is there acceleration in the y direction?
Yes , there is a constant acceleration is the y- axis. and that acceleration is called acceleration due to gravity or Gravity. Gravity attracts every falling body which is on y axis. that's why the gravity is on y axis which is constant
Can there be a positive acceleration and a negative acceleration?
Yes, acceleration can be positive and negative because acceleration is a vector. It has both direction and magnitude. The direction is what makes it positive or negative. Negative acceleration is usually called deceleration.
When is acceleration neg?
Acceleration is negative if velocity is decreasing with time. Since velocity is a vector this can occur in one of two ways: 1) you are slowing down in the direction of motion and the velocity in that direction is defined as positive (this is what we usually mean by negative acceleration) 2) you are speeding up in the direction of motion and the velocity in that direction is defined as negative. An example of this is an object launched into the air which immediately starts to decelerate in it's upward velocity, reaches it's highest velocity, and then begins accelerating towards the ground. If we call the velocity upward a positive velocity, then when it starts falling, it has negative velocity. Note that acceleration (due to gravity) is negative the whole time.
When is acceleration due to gravity positive and when is it negative?
Acceleration due to gravity is negative when an object is moving up. Accl'n due to gravity is positive when an object is moving down (since gravity acts downwards on an object). ^Acceleration due to gravity is always negative, while the acceleration of the ball upward was positive due to what threw it, not gravity.
Differentiate positive acceleration and negative acceleration?
A positive acceleration is a change in velocity such that the latter velocity is greater than the former velocity and is therefore going fasterwhile a negative acceleration or deceleration is a change in velocity such that the latter velocity is lesser than the former velocity and is therefore going slower.Now let us look at the equation of a uniform acceleration (the change in velocity is uniform):a = (vf-vi)/sIf the final velocity is greater, you will have a positive acceleration. If the initial velocity is greater, you will have a deceleration.
What is deceleration in physics?
Deceleration in physics refers to the rate at which an object slows down its speed or velocity. It is the negative acceleration of an object moving in the opposite direction of its velocity vector, causing it to decrease its speed. Deceleration can occur due to various factors such as friction, air resistance, or external forces acting on the object.
How is a negative acceleration different from a positive acceleration?
A negative acceleration refers to a decrease in velocity, while a positive acceleration refers to an increase in velocity. Negative acceleration occurs when the speed of an object is decreasing, such as when it is slowing down. Positive acceleration occurs when the speed of an object is increasing, such as when it is speeding up.
Is there acceleration in the y direction?
Yes , there is a constant acceleration is the y- axis. and that acceleration is called acceleration due to gravity or Gravity. Gravity attracts every falling body which is on y axis. that's why the gravity is on y axis which is constant
Can your net force and acceleration be in opposite directions?
No, they are always in the same direction, as expressed in Newton's Second Law, which is usually expressed as: F=ma (force = mass x acceleration). In this equation, acceleration is a vector, so when multiplying it by a mass (which is NOT a vector), you get another vector that points in the same direction.
Is stems growing upward positive or negative?
An upward direction is usually considered positive.
What is on the x axis and y axis on both a speed and acceleration graph?
Conventionally, the x axis is time and usually the y axis is, respectively, radial speed and radial acceleration. In such examples, the y-variables are measured in one direction from a fixed point (the origin). Motion across that direction is usually ignored.
Why there is no acceleration along x axis during projectile motion?
There is no force that acts upon the object in that direction. Gravity only acts on the y axis. Though there is some wind resistance that does cause a negative acceleration in the x direction. You are probably just being told to ignore this as it is usually negligible.
What is the significance of negative values on projectiles?
None, really. A projective is usually an object that is incapable of self-propulsion, and which is launched by an initial force. From that point on, it is acted upon by gravity (and if you are more advanced, by air resistance). Because of these forces, an object that is launched in an upward-sloping direction eventually starts moving downwards. The decision to call the upward direction the positive (initial motion is positive but acceleration is negative) or as negative (initial motion is negative but acceleration is positive) is purely arbitrary. Moreover, there are not even conventions on this matter because there are cases where one or the other option has minor arithmetical advantages. No significance can be attached to something that is based on an arbitrary decision.
