Sunday

December 21, 2014

December 21, 2014

Posted by **Julia** on Sunday, February 3, 2013 at 12:41pm.

At what time after being fired does the projectile reach this maximum height?

- Physics please help!! -
**Damon**, Sunday, February 3, 2013 at 1:23pmVi = 42.5 sin 45 = 30 m/s

v = Vi - 9.81 t

0 = 30 - 9.81 t

t = 3.06 seconds to top

h = 0 + Vi t - (1/2)9.81 t^2

h = 30(3.06) - 4.9 (3.06)^2

= 91.8 - 45.9

= 91.7 m

**Answer this Question**

**Related Questions**

Physics - A projectile is fired at 65.0° above the horizontal. Its initial speed...

Physics - a) A cannonball is fired horizontally from the top of a cliff. The ...

Physics - A projectile is fired straight up from a cliff which is 200 feet above...

science - A projectile is fired with an initial speed of 120m.s' at an angle of ...

science - A projectile is fired with an initial speed of 120m.s' at an angle of ...

Math - A projectile is fired straight up from a cliff which is 200 feet above ...

physics HELP - A projectile is fired with an initial speed of 1000 m/s at an ...

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

physics - A projectile is fired through the air. It is launched from the ground...

physics - A cannonball is fired horizontally from the top of a cliff. The ...