Kinematics and free falling objects

  • Thread starter lemurs
  • Start date
  • #1
30
0
alright got a question for my homework and am stuck on it...

here it is. If a ball is dropped from hieght H above ground and at the same instance, a ball is released from ground vertically. Determine the speeed of the second ball if the two balls are to meet at hieght of H/2 above ground.

with that info i am stuck I know that Intial velocity of the ball dropped =0 and that to calculate it disatance h/2 will use .5at^2.

but how to equate that to the second ball I am stuck.:confused:

help would be apprieciated
 

Answers and Replies

  • #2
berkeman
Mentor
59,936
10,142
Write the equation of motion for the 1st ball, showing its position as a function of time -- its motion is set, with no unknown variables. Solve for the time when the falling ball is at H/2.

Then write the equation of motion of the 2nd ball, showing its position as a function of time, with the initial velocity as the unknown. Then solve for Vo, given that you know what time t is for it to make it to H/2.
 

Related Threads on Kinematics and free falling objects

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
2
Views
3K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
7
Views
10K
Replies
3
Views
17K
Replies
1
Views
2K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
11
Views
1K
Replies
7
Views
2K
Top