Question

a body is projected with a speed u metre per second at an angle beta with the horizontal the kinetic energy at the highest point is 3/4 th of the initial kinetic energy the value of Beta is
a. 30 degree
b. 45 degree
c. 60 degree
d. 120 degree

Answer 1

60 degree kinetic energy the value of beta is 60 degree

Answer 2

beta should be 30 degrees .