Average velocity is equal to the instantaneous velocity when acceleration is zero. In order for acceleration of an object to equal zero, there can be no change in speed or direction.
When is the average velocity of an object the same?
- If an object‘s velocity is not changing, we say that it has a constant velocity. Whenever an object has a constant velocity, the average velocity will be the same as the instantaneous velocity. An example of this is a car driving down the highway at a constant speed of 60 miles per hour.
When average velocity is equal to instantaneous velocity?
Instantaneous velocity can be equal to average velocity when the acceleration is zero or velocity is constant because in this condition all the instantaneous velocities will be equal to each other and also equal to the average velocity.
Can average speed and instantaneous speed be equal explain?
Yes, instantaneous speed and average speed can be equal (and can be different). The simplest case is when a body has a constant speed. In this case, its instantaneous speed is the same at any moment and the average speed over any time interval has the same value.
Under what condition is average velocity equal to the average of the object’s initial and final?
Under what condition is average velocity equal to the average of the object’s initial and final velocity? The acceleration must be constant.
Can a body have zero velocity and still be accelerating?
Yes, an object can have zero velocity and still be accelerating simultaneously.
How do you find instantaneous velocity in physics?
The instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of x with respect to t: v(t)=ddtx(t). v ( t ) = d d t x ( t ). Like average velocity, instantaneous velocity is a vector with dimension of length per time.
What is instantaneous speed example?
Average Speed and Instantaneous Speed At a given instant time what we read from the speedometer is instantaneous speed. For example, a car moving with a constant speed travels to another city, it must stop at red lights in the traffic, or it should slow down when unwanted situations occur in the road.
What is difference between velocity and speed?
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object’s movement. Put another way, speed is a scalar value, while velocity is a vector.
What is the difference between uniform and variable velocity?
Uniform velocity is scalar, while variable velocity is vector. C. Uniform velocity doesn’t change with time, while variable velocity changes with respect to time. When the velocity of the body is not constant with respect to time, its velocity is called variable velocity.
Under what condition is average velocity?
Average velocity would be equal to average speed when the total distance travelled equals the net displacement of a particle. This happens when a particle moves along a straight line in a fixed direction.
When a ball is thrown straight up its acceleration at the top is zero?
As I throw a ball straight up into the air, the direction of the ball’s motion is initially upward, although it is actually traveling downward at 9.8 m/s squared. At the very top of a ball’s motion, its speed is zero and its acceleration is -9.8 meters per second squared.
Can an object’s velocity change direction when its acceleration is constant?
A object undergoing a constant acceleration has a constantly changing velocity. If the acceleration always points in the same direction as the velocity, the trajectory will be no different than if there were no acceleration, but in general acceleration will change the trajectory. Yes it can.
Can a body have constant speed and varying velocity?
No, a body can not have its velocity constant, while its speed varies. Rather, it can have its speed constant and its velocity varying. For example in a uniform circular motion.
How can you have acceleration but no velocity?
Since acceleration is the change in velocity over time, there has to be a change in velocity for something to accelerate. Although at an instant in time it is possible to have zero velocity whilst accelerating. For example, if you drop an object at the instant you release it it has zero velocity but it is accelerating.
Can a body have zero acceleration but non-zero velocity?
Yes, it’s possible to have zero speed while accelerating, but only for an instant. Acceleration is the rate at which an object’s speed and direction are changing with time, so whenever an object passes through zero speed as it reverses directions it has a non – zero acceleration but a speed of zero.