00:01
Hi students in this question, a racquetball is being given whose acceleration a has to be determined.
00:06
Now from newton's second law of motion, we know that force f will be equal to the rate of change of momentum, that is delta p divided by delta t.
00:15
Further, force f will be equal to the product of mass into acceleration and the change in momentum delta p will be equal to mass into final velocity minus initial velocity, which is taken as v and p respectively.
00:29
Therefore, from these two equations, the above equation can be rewritten as m, a to be equal to m into v minus u divided by delta t, which aren't simplification means the value of acceleration a to be equal to v minus 2 divided by delta t.
00:45
Now in this question, the initial velocity u is taken to be minus 30 meter per second.
00:51
On the other hand, final velocity v is taken to be 26 meter per second...