Ask Experts Questions for FREE Help !
Ask
    leke10's Avatar
    leke10 Posts: 1, Reputation: 1
    New Member
     
    #1

    Oct 6, 2010, 11:03 PM
    physic question
    a ball is thrown straight up and rises to a maximum height of 22m. At what height is the speed of the ball equal to half of its initial value?assume the ball starts at a height 2.2m above the ground
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
     
    #2

    Oct 7, 2010, 02:51 AM

    Find the initial speed first.

    Use:



    Where v is the final velocity
    u the initial velocity
    a the acceleration
    s the displacement.

    We'll take up as positive.





    So, now, you need to use the same formula, but with the final speed v as being half that speed you just found, that is 19.7/2 = 9.85 m/s.



    Find s.

    This s is the displacement above the starting height. So, add 2.2 m to this.

    Post what you get! :)

    ANS: 14.85 m + 2.2 m = 17.05 m

Not your question? Ask your question View similar questions

 

Question Tools Search this Question
Search this Question:

Advanced Search

Add your answer here.


Check out some similar questions!

Physic reading ball question now answer me [ 5 Answers ]

Am I pregnant now and can I get pregnant

Physic homework! [ 4 Answers ]

Two metal electrodes of size 2.0 cm \times 2.0 cm are spaced 1.0 mm apart and connected by wires to the terminals of a 9.0 {\rm V} battery. A- What is the charge on each electrode? Express your answer using two significant figures. Answer Q1= pC. B- What is the potential difference between...

Physic? [ 5 Answers ]

Ok... I look into the eyes of animals and can tell their feelings, I can pet WILD animals when no one else can ever get close to them. Is this just in my mind? Please tell me. :p I put this here because most people would think it is fake/fantasy.

Physic [ 1 Answers ]

A car is travelling at 30 mi/hr when a traffic light 295 ft ahead turn yellow . The light wiil remain yellow for 5 seconds before turning red. A) What constant acceleration will cause the car to reach the light at the instant it turns red, and what will the velocity of the car be when it reaches...


View more questions Search