Numerical - Minimum velocity of ball on inclined plane with horizontal

Q.  What is the minimum velocity attained by a ball thrown with velocity of 20 m/s at an angle of 40o with the horizontal?
- Published on 21 Sep 15

a. 15.32 m/s
b. 12.85 m/s
c. 16.78 m/s
d. None of the above

ANSWER: 15.32 m/s
 

    Discussion

  • Sravanthi   -Posted on 15 Dec 15
    Given: velocity = 20 m/s, α = 40°

    Formula: Minimum velocity = u cos α

    Solution:

    Minimum velocity in a projectile motion is obtained at the top.

    Substituting the given values, we get

    Minimum velocity = u cos α

    = 20 x cos 40

    = 15.32 m/s

    The minimum velocity attained by a ball thrown with velocity of 20 m/s at an angle of 40° with the horizontal is 15.32 m/s

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