The position of a particle moving on an x axis is given by: x=7.8 + 9.2t - 2.1t^3 with x in meters and t in seconds. What is its velocity at t=3.5s? Is velocity constant or changing?© BrainMass Inc. brainmass.com February 24, 2021, 2:10 pm ad1c9bdddf
Velocity = rate of change in displacement/change in time
v = dx/dt which is the derivative of 'x' with respect to 't'
= d(7.8)/dt + d(9.2t)/dt - d(2.1t^3)/dt
since d(a+b+c)/dt = ...
This solution provides step by step calculations for finding the velocity based on the derivative of 'x' with respect to 't'.