Physics, 03.02.2020 09:50 kendallnowell18

Which statement best explains acceleration?

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Answer from: bbbbhu

Acceleration is the ratio of a change in velocity to the time over which the change happend

Answer from: kcarstensen59070

Acceleration is just how fast velocity is changing in a certain time. Simply subtract the final velocity from initial velocity, then take that number and divide that by the change in time. If that sounds familiar, it's because it's the same formula you use to find the slope of a line. If you've done calculus, it's finding the secant line, which means you've found the average acceleration using the (change in v)/(change in t). If you need the instantaneous acceleration, you need to take the derivative of your function at a certain time(also calculus.) ignore the last two sentences if you haven't taken calc1

Answer from: Quest

technology is the collection of techniques, skills, methods, and processes used in the the merriam-webster learner's dictionary offers a definition of the term: "the use of moreover, these technologies have become so complex that entire fields more recently, modern works of science fiction such as those by philip k.

explanation:

Answer from: Quest

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

$f\alpha \frac{dp}{dt}$

⇒ $f= k \frac{dp}{dt}$

here k is the proportionality constant whose value is 1.

$f=\frac{dp}{dt}$

$f= \frac{d[mv]}{dt}$

$f= m\frac{dv}{dt} +v\frac{dm}{dt}$

$f=ma+v\frac{dm}{dt}$ [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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