Scelta multipla
An electric vehicle starts from rest and accelerates at a constant rate of for a time . What is the final speed of the vehicle after time ?
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2. 1D Motion / Kinematics
Intro to Acceleration
Scelta multipla
In introductory kinematics, which quantity is defined as the rate at which velocity changes with time?
A
Speed
B
Displacement
C
Acceleration
D
Momentum
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Understand the definitions of the given quantities: Speed is the rate of change of distance with time, Displacement is the change in position, Momentum is the product of mass and velocity.
Recall that velocity is a vector quantity representing the rate of change of displacement with time.
Acceleration is defined as the rate at which velocity changes with time, mathematically expressed as \(\vec{a} = \frac{d\vec{v}}{dt}\).
This means acceleration measures how quickly an object's velocity increases or decreases over time.
Therefore, among the options, acceleration is the quantity that fits the definition of the rate of change of velocity with respect to time.
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