Sunday

December 21, 2014

December 21, 2014

Posted by **help** on Monday, November 8, 2010 at 1:22am.

- 11th grade physics -
**Anonymous**, Friday, October 12, 2012 at 1:59pmLet 'x' be the angle of projectile with the horizontal.

Then,taking g=10m/s^2:

Given, Hmax=[(usinx)^2]/2g;

R=4(root of 3)x(Hmax);

R=[(u^2)(sin2x)]/g;

Thus,

(u^2)sin2x 4(usinx)^2

-------- = --------------

g (root of 3)2g

Then,upon simplification:

sin2x 2(sinx)(sinx)

----- = -------------

1 (root of 3)

2sinxcosx 2

--------- = -----------

sinxsinx (root of 3)

cosx 1

---- = cotx = -----------

sinx (root of 3)

So,x=60 degrees.

**Answer this Question**

**Related Questions**

Physics - A projectile is fired in such a way that its horizontal range is equal...

physics - A projectile is fired in such a way that its horizontal range is equal...

Physics - a projectile is fired with an initial speed of 53 m/s. Find the angle ...

Physics - A projectile is fired in such a way that its horizontal range is equal...

Physics - At what projection angle will the range of a projectile equal to 5 ...

physics - a projectile thrown at an angle Ө with the horizontal has ...

physics - A projectile is projected with speed u at an angle alpha on an ...

phy - At what projection angle will the range of a projectile equal to 3 times ...

physics - At what projection angle will the range of a projectile equal to 6 ...

projectile motion - A missile is fired upwards from the top of a cliff in a ...