Physics
posted by Jeesha .
NEED HELP On a flat battle ground, a catapult is used to launch a rock with a velocity of 25m/s at angle 30 degrees above the horizontal.?
Sketch the situation and decompose the initial velocity vector. WHat are the initial values for Vx and Vy?
Calculate the maximum height achieved by the rock
calculate the range
calculate the rock's velocity (magnitude and direction) 2.0 seconds after the launch

Vo = 25m/s[30o]
Vx = 25*cos30 = 21.65 m/s.
Vy = 25*sin30 = 12.50 m/s.
h=(V^2Vy^2)/2g=(0(12.5^2)/19.6=7.97 m
Range = Vo^2*sin(2A)/g
Range = 25^2*sin(60)/9.8 = 55.23 m.
V=Vy + g*t = 12.50 + (9.8*2) = 7.1m/s
21.65  7.1i=22.78m/s[18.16o]=Velocity
2 seconds after the launch.
Note: The hor. component of velocity
does not change.
Respond to this Question
Similar Questions

Physics
A man stands on the roof of a 19.0 mtall building and throws a rock with a velocity of magnitude 24.0 m/s at an angle of 38.0 degrees above the horizontal. You can ignore air resistance. Calculate the maximum height above the roof … 
Physics
A rock is projected from the edge of the top of a building with an initial velocity of 19.6 m/s at an angle of 31 degrees above the horizontal. The rock strikes the ground a horizontal distance of 77 m from the base of the building. … 
pysics 1
At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at the same height from which the … 
PHYSÝCS
At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at the same height from which the … 
PreAp Physics
A rock is projected from the edge of the top of a building with an initial velocity of 16.3 m/s at an angle of 39 ◦ above the horizontal. The rock strikes the ground a horizontal distance of 90 m from the base of the building. … 
physics
A catapult gives a rock a vertical velocity of 122m/s. a. Determine the time the rock is in the air. b. Determine the maximum height the rock would reach. c. As the rock leaves the catapult the rock also has a horizontal velocity of … 
physics
A projectile is launched over level ground at a launch angle of 70o with an initial velocity vo. At some later time while the projectile is on its way to the peak in its trajectory, its velocity vector makes an angle of 50o with respect … 
Physics
A man stands on the roof of a building that is 50 m tall and throws a rock with a velocity of 35 m/s at an angle of 50 degrees above the horizontal (a) What is the total time in the air (b) What is the horizontal distance from the … 
Physics
A man stands on the roof of a building that is 50 m tall and throws a rock with a velocity of 35 m/s at an angle of 50 degrees above the horizontal (a) What is the total time in the air (b) What is the horizontal distance from the … 
physics question
For a science fair competition, a group of high school students built a kicker machine that can launch a golf ball from the origin with a velocity of 11.2m/s and initial angle of 31.5° with respect to the horizontal. a) Where will …