Recent content by StephenP

I had considered more or less the same thing before, but didn't succeed at first and started REALLY overthinking things. Between you and a night's sleep, it all seems rather simple now. Thanks for putting me back on track! :smile:

In your problem statement, you said you are only trying to find the speed with which it lands. So, for the ball being thrown down, don't worry too much about calculating the distance. What we know is that the cliff is at a height h, so the y-distance is going to be only h. You have the initial...

In that case, you can use your kinematics equations. For the ball which is thrown downward, you can resolve the initial velocity into its x- and y-components. Then, you have the initial speed, the acceleration, and the distance it falls. From this you should be able to calculate the final speed...

Homework Statement You push an object of mass m slowly, partway up a loop-the-loop track of radius R, starting from the bottom, where the normal force to the track is vertically upward, and ending at a point a height h< R above the bottom. The coefficient of friction between the object and the...

Are you familiar with the work-energy equations? Your life will be much simpler if you try equating the initial (potential and kinetic) energy with the final (solely kinetic) energy.