- Home
- Standard 11
- Physics
5.Work, Energy, Power and Collision
easy
A cricket ball is hit at ${30^o}$ with the horizontal with kinetic energy $K$. The kinetic energy at the highest point is
A
Zero
B
$K/4$
C
$K/2$
D
$3K/4$
Solution
(d) Kinetic energy at the highest point
$K' = K{\cos ^2}\theta = K{\cos ^2}30$$ = K{\left( {\frac{{\sqrt 3 }}{2}} \right)^2} = \frac{{3K}}{4}$
Standard 11
Physics
