Saturday

October 25, 2014

October 25, 2014

Posted by **Jenny** on Tuesday, September 9, 2008 at 12:27am.

height h and horizontal range R

(1) How to get launch angle θ in terms of h and R

(2) A hobby rocket reaches a height of 72.3 m and lands 111 m from the launch point.What is the angle of launch?

What is the launch speed?

- physics -
**drwls**, Tuesday, September 9, 2008 at 12:45amLet θ be the launch angle. Assume the ground is level. Let V be the launch speed.

R = 2 (V^2/g) sin θ cos θ

h = V^2 sin^2 θ / (2g)

R = 4 h cosθ/sin θ = 4 h cotθ

Check my thinkng.

**Answer this Question**

**Related Questions**

physics - The range R of a projectile is defined as the magnitude of the ...

Physics - The range R of a projectile is defined as the magnitude of the ...

physics - Suppose that a shot putter can put a shot at the worldclass speed v0...

physics - 1)In the special case of projectile, at what initial angle the range ...

physics - A projectile is being launched from ground level with no air ...

Physics - For a given initial projectile speed, you observe that the projectile ...

physics - three more questions: 1) A 1.50kg projectile is launched at 18.0m/s ...

Physics - Q Exactly 2.7s after a projectile is fired into the air from the ...

physics - A projectile is fired with an initial speed of 65.2 m/s at an angle of...

physics - a projectile is thrown from the ground with an initial velocity of 20....