Apackage of mass 5.30 slides a distance 1.41 down a long ramp that is inclined at an
angle12.3 below the horizontal. the coefficient of
kineticfriction between the package and the ramp is = 0.315
.
a ) calculate the work done on the package by friction.
b) calculate the work done on the package by gravity.
c) calculate the work done on the package by the
normalforce.
d) calculate the total work done on the package.
e) if the package has a speed of 2.25 at the top of the ramp, what is its speed after
slidingthe distance 1.41
down the ramp?

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island