Kinetic energy at highest point in projectile motion

Q.  What is the kinetic energy at the highest point, if at an angle of 30o with the horizontal a ball is projected with a kinetic energy E?
- Published on 18 Sep 15

a. E / 2
b. E / √2
c. 5E / 4
d. 3E / 4

ANSWER: 3E / 4

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    Discussion

  • Sravanthi   -Posted on 15 Dec 15
    The kinetic energy at highest point is given as :

    K.E. = (cos α)2 E

    α = 30°

    K.E. = (cos 30)2 E

    K.E. = (√3/4)2 E

    = (3/4) E

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