Problem

The curve that passes through the point (1,1) and…

Problem 18 Hard Difficulty

A 10 $\mathrm{kg}$ block is placed at the top of an inclined plane with an angle of incline of $30^{\circ}$ and $\mu_{\mathrm{k}}=0.1 .$ Ithe height of the inclined plane is $2 \mathrm{m},$ what is the kinetic energy of the block when it is halfway down the
incline?
(A) 64 $\mathrm{J}$
(B) 72 $\mathrm{J}$
(C) 91 $\mathrm{J}$
(D) 100 $\mathrm{J}$

Answer

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Cracking The AP Physics 1 Exam

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Video Transcript

frantic energy of a block. It is halfway down on the inclined plane is given by a potential energy. Oh, half minus of the world on by the friction. So they wanted by the friction can burden is new friction coefficient times the mg, which is a normal force times, of course, data course they don't times the distance traveled by a block. So substituting the values we air masses a 10 times reputational explosion 10 times the height is too divided by two year AA minus. Here we have ah, 0.21 for the option of friction that isn't in mass multiply with the gravitational acceleration. Then times, of course, over 30 So goes over 30 and the distance So the distant troubled by the block where is given by D. Z called, too the word ical Hi! Divided by a sign off signing off for 30. This gives us the total distance off a 44 off the incline planned for meter. Since the block has traveled the half a distance off the incline plants, org will be the actual distance will be for the human fallible Olivia To so substituting the two when you hear So let me differentiated by divan. So do here then. Oh result. We get here easy for kind of energies and 91 therefore, our option sees the right answer.

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Problem

The curve that passes through the point (1,1) and…

Problem 18 Hard Difficulty

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Princeton Review

Cracking The AP Physics 1 Exam

Cracking The AP Physics 1 Exam

Princeton ReviewCracking The AP Physics 1 Exam

Princeton Review

Cracking The AP Physics 1 Exam