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    ingrid_fritz's Avatar
    ingrid_fritz Posts: 2, Reputation: 1
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    #1

    Oct 13, 2010, 01:03 PM
    Grade 11 physics help?
    I have problems with the formula to use for this question: For a projectile hrown horizontally at 50 km/h, calculate the velocities in the vertical direction at 1.0s, 2.0s and 3.0s.

    I am pretty sure that distance needs to be found.. but if I could get a step by step answer it would really help... I am new to physics and find that the text is too detailed. I am trying to help my daughter with this.

    Thanks
    olderexgeek's Avatar
    olderexgeek Posts: 9, Reputation: 1
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    #2

    Oct 13, 2010, 02:25 PM
    Well in the vertical direction you have only air resistance and gravitational force operating on it-so 32'/sec should be drop in first second, 64 more feet in second #2 etc-as there is no given height I'ld say just use gravity to figure out to however many seconds you need to at 32'/sec/sec or 9.8m/sec/sec
    ingrid_fritz's Avatar
    ingrid_fritz Posts: 2, Reputation: 1
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    #3

    Oct 13, 2010, 03:52 PM
    Comment on olderexgeek's post
    Thanks for the quick reply.. it was very helpful as I have not done this for 21 yrs and I'm very rusty at it now. The lack of height was really throwing me off... I will be able to help my daughter now.. Thanks
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