 |
|---|
| PAGE: 50 | SET: Exercises | PROBLEM: 5 |
The velocity of the ball is thrown into the air is 
ft/s.
The function of the ball is 
.
(a)
Average velocity :
The average velocity is defined as the ratio of change in distance by change in time.
, where 
.
Now ball is at beginning stage at 
.
Substitute 
in the function 
.
(i)
Find the average velocity at 
.
Substitute and 
in the above expression.
The average velocity at is 
ft/s.
(ii)
Find the average velocity at 
.
Substitute and 
in the above expression.
The average velocity at is 
ft/s.
(iii)
Find the average velocity at 
.
Substitute and 
in the above expression.
The average velocity at is 
ft/s.
(iv)
Find the average velocity at 
.
Substitute and 
in the above expression.
The average velocity at is 
ft/s.
(b)
Find the instantaneous velocity when .
Instantaneous velocity :
The instantaneous velocity is defined as 
.
Substitute in the above expression.
( Since 
)
The instantaneous velocity when is 
ft/s.
(a) (i) The average velocity at is 
ft/s.
(ii) The average velocity at is 
ft/s.
(iii) The average velocity at is 
ft/s.
(iv) The average velocity at is 
ft/s.
(b) The instantaneous velocity when is 
ft/s.
|
"I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett |
|
"Your site is amazing! It helped me get through Algebra." Charles |
|
"My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease |
Simply chose a support option
  
|