Question

The position of an object moving along x axise is given by x= a+ bt2 where a=8.5 m ,b=2.5 m/s entity is measured in second what is the velocity at 30 equal to zero and 30 equal to 2.0 second what is the average velocity between 30 equal to 2 second and 30 equal to 4 second

Answer 1

differentiating v=5t. when time is 2 v=10 m/s when t=3. v=15. when t=4 v=20 . avg vel bet t=2. and t=3. is 15 m/s