Solve this:

Solve this: the chord AB where A and B the Figure 3.4 curve to the time t and t + At. As At approaches the chord AB becomes the tangent at A and the avera* speed becomes the slope of the tangent which is • If the speed of the particle at time t is v, the distance ds travelled by it in the short time interval t to t + dt is v dr. Thus, ds = vdt. The total distance travelled by the particle in a finite time interval tl to t2 can be obtained by summing over these small distances ds as time changes from tl to t2. Thus, the distance travelled by a particle in the time interval 33 (6 9 3.4 A t. to 3.7) displ