Homework Statement
a dolphin swims near the sea surface 350m west, then 200m northwest, and then dives below the surface and swims an additional distance in an unknown direction. The final position of the dolphin is 80m directly below the fishing boat located 400m north of the starting point...
Not really, the reason why I ended up with a positive value instead of a negative is because
144 = 0 - 2(-9.6)(1/5 height) = 144 = 0 -(-19.6)(1/5 height) = 144 = 19.6 (1/5 height). If you don't agree let me know.
Homework Statement
An object is shot vertically upward and has a speed of 12 m/s when it reaches one fifth of its maximum height.
a. What is the initial speed of the object?
b. What is the maximum height of the object?
Homework Equations
Free falling objects
The Attempt at a Solution...
Homework Statement
A 420 g soccer ball traveling at 23 m/s hits the goal post and rebounds at 18 m/s. If the ball is in contact with the post for 3.3 ms, what is the average acceleration of the ball during this time interval?
Homework Equations
Here I used 23m/s as initial velocity v_i and...
The thing is that it is an introductory course in Physics and conversion of energy hasn't been dealt with yet, the exercise is in context of 2D motion. I am just thinking would the speed not be the magnitude of the 5m vector in the -y axes and in the +x axis be the initial point of the free fall...
Homework Statement
A block of ice starts from rest on an apartment building’s roof, which slopes at 41° below the horizontal. The block slides down the icy frictionless roof for 5.0 m and then leaves the edge, which is 12 m above the ground.
a. How far from the building does the block strike...