c. use kinematics equation
vi= 0 (because rock was dropped)
t= 4s (time given)
plug in and you get your height
a. use kinematics equation
vi=0 (rock dropped)
y= (whatever you got from part c)
plug in and solve
To do this problem you just need to use a few simple equations:
V = V0 + at
X = X0 + V0*t + .5*a*(t^2)
V^2 = V0^2 + 2*a*(X - X0)
where V0 equals the initial velocity
X0 equals the initial height
t equals the time
a is just the acceleration (gravity in this case [9.81 m/s^2])
V is the final velocity
X is the final height
I think this should help you.
Answer this Question
physics - A rock is dropped from a bridge to the water below. It takes 2.4s to ...
physics - A rock is dropped from bridge to the water below. It take 2.4s to hit ...
physics - a 2.00 lb rock is dropped from a bridge to the water 50 below. a. what...
Physics 270-1 Applied - A rock is thrown down with an initial speed of 30.0ft/s ...
physics - A rock is thrown down with an initial speed of 10.0 m/s from a bridge...
physics - A rock is dropped off of a bridge into the water below. If the ...
physics - a 2.00 kg rock is dropped from a bridge to the water 50.0m below. ...
Physics - A rock thrown from a bridge hits hte water below at a horizontal ...
physics - A rock thrown horizontally from a bridge hits the water below at a ...
11th grade - a rock is dropped from a 20.0m bridge falls into the river below. a...