When lines intersect on a velocity-time graph
, it means that the two cars have the same velocity. When lines intersect on a position-time graph, it means that the two cars are passing each other.
How do you know if two graphs have the same velocity?
- slope equals acceleration .
- the”y” intercept equals the initial velocity .
- when two curves coincide, the two objects have the same velocity at that time.
- straight lines imply uniform acceleration .
- curved lines imply non-uniform acceleration .
Which have the same velocity?
Objects have
the same velocity only if they are moving at the same speed and in the same direction. Objects moving at different speeds, in different directions, or both have different velocities. … A and C represent objects that have different velocities only because they are moving at different speeds.
At which point is the velocity of the car the same?
Average speed
. Both are the same when the speed is constant and the car does not change its direction. Magnitude of average velocity. Both are same when the car is traveling at a constant speed.
What does a constant velocity graph look like?
Constant velocity means the velocity graph is
horizontal
, equal to 11.11 m/s at all times. A constant velocity means the position graph has a constant slope (of 11.11 m/s). It’s a straight line sloping up, and starting below the origin. The displacement is the area under the curve of the velocity graph.
What is difference between speed and velocity?
The reason is simple. 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 two factors does velocity describe?
Velocity is a measure
of both speed and direction of motion
. Velocity is a vector, which is a measurement that includes both size and direction.
How do you calculate velocity?
Velocity (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the equation
v = Δs/Δt
. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the equation r = d/Δt.
What is constant speed?
An object is travelling at a steady or constant speed
when its instantaneous speed has the same value throughout its journey
. For example, if a car is travelling at a constant speed the reading on the car’s speedometer does not change.
What is rate of change in velocity?
The rate of change of velocity is
ACCELERATION
. … The velocity of an object is the speed of an object moving in a definite direction. Acceleration is a vector quantity that is defined as the rate at which an object changes its velocity. An object is accelerating if it is changing its velocity.
How do you know if velocity is constant?
If you are given a velocity graph and it is horizontal (blue and green lines below)
, then the velocity is constant. … If you are given an acceleration function or graph and it is zero (green line below), then the velocity is constant. If it is anything but zero, then the velocity is not constant.
Does constant velocity mean no acceleration?
If an object is changing its velocity -whether by a constant amount or a varying amount – then it is an accelerating object. And
an object with a constant velocity is not accelerating
.
What are 5 differences between speed and velocity?
| Speed Velocity | Speed ascertains how fast a body moves. Velocity ascertains the object’s speed and the direction it takes while moving. |
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What are the similarities and differences between speed and velocity?
Speed and velocity both represent a way to measure the change in position of an object relative to time. In fact, for
a straight line motion
, the speed and velocity of an object are the same (since distance and displacement will be the same). Speed and velocity are measured in the same units: meters per second or m/s.
What is the most important distance between velocity and speed?
| Speed Velocity | Speed is the distance traveled by a body in a unit time. Velocity is the displacement covered by a body in a unit time. | Speed is a scalar quantity Velocity is a vector quantity. |
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