Homework Help: Physics

Posted by anne on Tuesday, May 17, 2011 at 6:45pm.

Suppose the stone is thrown at an angle of 32.0° below the horizontal from the same building (h = 49.0 m) as in the example above. If it strikes the ground 69.3 m away, find the following. (Hint: For part (a), use the equation for the x-displacement to eliminate v0t from the equation for the y-displacement.)
(a) the time of flight s

(b) the initial speed m/s

(c) the speed and angle of the velocity vector with respect to the horizontal at impact
speed m/s
angle ° below the horizontal

Physics - bobpursley, Tuesday, May 17, 2011 at 8:42pm
you know the initial horizontal velocity was

Vh=Vicos32
distancehoizontal=vh/time

so time= vicos32/69.3

hf=hi-viSin32*vicos32/69.3 -1/2 g (vicos32/69.3)^2

or..0=69.3^2 - vi^2 sin32cos32-1/2 g vi^2 cos^2 32/69.3

you can calulate vi from that, then go back and calculate t.
Physics - anne, Wednesday, May 18, 2011 at 6:02pm
can u explain it in another way

Answer this Question

Related Questions

Physics - Suppose the stone is thrown at an angle of 32.0° below the ...
science - Two stones are launched from the top of a tall building. One stone is ...
Physics - From the edge of the rooftop of a building, a boy throws a stone at an...
Physics - From the edge of the rooftop of a building, a boy throws a stone at an...
physic - A girl throws a stone from a bridge. Consider the following ways she ...
physics - From the edge of the rooftop of a building, a boy throws a stone at an...
physics - Suppose a stone is thrown at an angle of 30 degrees below the ...
physics - A stone is thrown from a building of height 40m and reaches a maximum ...
physics - Stones are thrown horizontally with the same velocity from the tops of...
physics - Three identical balls are thrown from the top of a building, all with ...

For Further Reading

First Name:
School Subject:
Answer: