Question

what is acceleration​

Answer 1

The above equation says that the acceleration, aaa, is equal to the difference between the initial and final velocities, v_f - v_ivf​−vi​v, start subscript, f, end subscript, minus, v, start subscript, i, end subscript, divided by the time, \Delta tΔtdelta, t, it took for the velocity to change from v_ivi​v, start subscript, i, end subscript to v_fvf​v, start subscript, f, end subscript. 

the units for acceleration are \dfrac{\text m/s}{\text s}sm/s​start fraction, m, slash, s, divided by, s, end fraction , which can also be written as \dfrac{\text m}{\text s^2}s2m​start fraction, m, divided by, s, start superscript, 2, end superscript, end fraction. That's because acceleration is telling you the number of meters per second by which the velocity is changing, during every second. Keep in mind that if you solve \Large{a= \frac {v_f-v_i}{\Delta t}}a=Δtvf​−vi​​a, equals, start fraction, v, start subscript, f, end subscript, minus, v, start subscript, i, end subscript, divided by, delta, t, end fraction for v_fvf​v, start subscript, f, end subscript, you get a rearranged version of this formula that’s really useful.

v_f=v_i+a\Delta tvf​=vi​+aΔtv, start subscript, f, end subscript, equals, v, start subscript, i, end subscript, plus, a, delta, t

This rearranged version of the formula lets you find the final velocity, v_fvf​v, start subscript, f, end subscript, after a time, \Delta tΔtdelta, t, of constant acceleration

Answer 2

In physics, acceleration is the rate of change of velocity of an object with respect to time. An object's acceleration is the net result of all forces acting on the object, as described by Newton's Second Law. The SI unit for acceleration is metre per second squared.