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1. A car moving forward at 5m/s. 2. A car moving backward 5m/s. In scenario one the speed of the car is 5m/s and the velocity is also 5m/s. In scenario two the speed of the car is 5m/s but the velocity is -5m/s. We see that because the direction of the car is opposite in the second scenario we define its velocity as negative.
Velocity is the rate of change of displacement ( change of distance in a particular direction with respect to time) , and acceleration is the rate of change of velocity per unit of time. (Amount of increase or decrease in velocity). Also, speed is a scalar quantity but velocity and acceleration are vector quantities. Speed is the rate of change ...
Velocity is a vector quantity whcih means that it is quantified by a magnitude and a direction (it can also be considered to be speed in a given direction).Acceleration is the rate of change of velocity, which means that it is the measure of change in velocity over a given time. Since it is a change in velocity rather than a change in speed ...
The SUVAT equations are used when acceleration is constant and velocity is changing. If speed is constant, you can use the speed, distance and time triangle. They can be used to work out initial and final speed, time, dispacement and acceleration, if at least three quantities are known. Answered by Jennifer M. • Physics tutor.
The speed-time graph will be a horizontal straight line as the object is travelling with constant velocity throughout its motion. Constant velocity also tells us that the the object is not accelerating so the acceleration-time graph would be a horizontal straight line at 0m/s 2.
Explain the difference in the speed of conduction of an action potential along the length of a myelinated neurone and a non-myelinated neurone. First, we need to explain how the action potential is conducted along the length of the axon.
To distinguish between two directions in velocity, you can have a positive and a negative vector: vectors that point in the opposite direction. Therefore, a negative velocity means that the direction of that velocity is opposite to the other velocity (with the positive value). To understand this question, it is important to know that velocity ...
Velocity is a vector quantity so takes both magnitude and direction into account. Speed is a scalar so ...
So the faster they go, the smaller the total force pulling them down is, and the smaller their acceleration, until they reach a speed where they are in Equilibrium - the Drag force equals the force of Gravity, and they stop Accelerating. This means they fall at a constant speed, called the 'terminal velocity'.
Acceleration is defined as the rate of change of velocity. Since velocity is a vector quantity (it has both magnitude and direction) defined as speed in a particular direction, any change in either speed or direction of travel is a change in velocity. Acceleration therefore occurs whenever an object changes direction- for example, a car driving ...
