Does a particle moving in a straight line with constant speed have acceleration?
The particle moving in a straight line with constant speed does not accelerate, while the particle moving along a curve experiences acceleration. By Newton’s first law of motion, a body in motion does not change direction unless an external force (depicted as an acceleration) acts on it.
What is the acceleration of an object moving in a straight line?
4 Answers. You are using the word “linear” in two different ways. When an object moves along a straight line we can say its motion is linear – but that does not mean its acceleration is zero. Just that the acceleration points along the same direction as the velocity (so no change in the direction of the motion).
Why is acceleration a straight line?
A straight line is a curve with constant slope. Since slope is acceleration on a velocity-time graph, each of the objects represented on this graph is moving with a constant acceleration.
Can there be acceleration if velocity is zero?
Answer: Yes, an object can have zero velocity and still be accelerating simultaneously. Let us consider an object moving in the forward direction.
Can initial velocity be zero?
Well if an object starts from rest then it’s initial velocity would be zero however if it is already in motion then it does have an initial velocity of greater than zero.
Is V final velocity?
The symbol v0 [vee nought] is called the initial velocity or the velocity a time t = 0. The symbol v is the velocity some time t after the initial velocity. It is often called the final velocity but this does not make it an object’s “last velocity”.
What is initial and final velocity?
Initial velocity is the velocity which the body has in the beginning of the given time period and final velocity is the velocity which the body has at the end of the given time period.
Is the initial velocity the same as the final velocity?
For ideal conditions, initial velocity equals final velocity if, but only if, initial and final elevations (Y) are equal. In fact during flight, the velocity on the way up at a given elevation (Yn) is the same as the velocity on the way down at that same elevation (Yn).
What is difference between initial and final?
Initial velocity is the velocity at time=t1, where t1 is the beginning of the time intervalof interest, typically chosen as zero. Finalvelocity is the velocity at time=t2, where t2 isthe end of the time interval of interest.
What is initial velocity class 9th?
Initial Velocity is the velocity at time interval t = 0 and it is represented by u. It is the velocity at which the motion starts. They are four initial velocity formulas: (1) If time, acceleration and final velocity are provided, the initial velocity is articulated as. u = v – at.
What does initial and final mean?
Show Definitions. Initial adjective – Coming before all others in time or order. Usage example: you’ve resolved my initial complaint, but now I have a new question. Final is an antonym for initial in topics: opening, beginning. Nearby Words: initiate, initiation, initialing, initialed, initialize.
What is the difference between acceleration and retardation?
Distinguish between acceleration and retardation. Acceleration is the increase in velocity per second, while retardation is the decrease in velocity per second. Thus, retardation is negative acceleration. In general, acceleration is taken positive, while retardation is taken negative.
What is formula of retardation?
The formula for retardation is- r=−a⇒r=−(v−u)t. Here, r is the retardation. a is the acceleration. v is the final velocity.
Which acceleration is known as retardation?
Negative Acceleration is called Retardation, or Deceleration.
Which acceleration is retardation?
Answer Expert Verified Retardation means negative acceleration. If the velocity of a body decreases,the acceleration is negative. Example: The acceleration of a body is -5 m/s2. then we can say that the retardation of the body is 5 m/s2.
How do you convert acceleration to retardation?
The negative acceleration value indicates that a body’s velocity is decreasing. So, you can get a negative acceleration value in the case of vretardation….Thank you.
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What are the examples of acceleration and retardation?
For a decelerating body, direction of velocity and acceleration is always opposite in direction. Example: When a body is thrown vertically upwards, during the upward motion, its velocity decreases and at the highest point it becomes zero. This is a case of retardation.