Physics question related to work power energy and projectile motion
Favorites|Homepage
Subscriptions | sitemap
HOME > > Physics question related to work power energy and projectile motion

Physics question related to work power energy and projectile motion

[From: ] [author: ] [Date: 11-12-03] [Hit: ]
.-When the body reaches the highest point it has 0 velocity in the vertical but will still have a component of velocity in the horizontal (for other than theta of 90 degrees).E = (1/2)m*v^2 ...The horizontal velocity is constant since there is no air resistance,......
A body is projected at an angle of projection Θ with kinetic energy E. Neglecting air friction, the kinetic energy at the highest point is a) zero (b) E (c) E cos Θ (d) E cos^2 Θ please tell the answer and explain it..

-
When the body reaches the highest point it has 0 velocity in the vertical but will still have a component of velocity in the horizontal (for other than theta of 90 degrees).

E = (1/2)m*v^2 ... the standard equation for kinetic energy
v*cos(theta) = the component of velocity in the horizontal

The horizontal velocity is constant since there is no air resistance, etc so at max altitude:
E = (1/2)m*[v(cos(theta)]^2 = [(1/2)*m*v^2]*cos^2(theta) = E*cos^2(theta)

So the answer is d
1
keywords: and,power,to,projectile,energy,motion,Physics,work,question,related,Physics question related to work power energy and projectile motion
New
Hot
© 2008-2010 http://www.science-mathematics.com . Program by zplan cms. Theme by wukong .