A28 kg rock approaches the foot of a hill with a speed of 15 m/s. this hill slopes upward at a constant angle of 40.0◦ above the horizontal. the coefficients of static and kinetic friction between the hill and the rock are 0.75 and 0.20, respectively. (a) use energy conservation to find the maximum height above the foot of the hill reached by the rock. (b) will the rock remain at rest at its highest point, or will it slide back down the hill? (c) if the rock does slide back down, find its speed when it returns to the bottom of the hill.
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Physics, 21.06.2019 22:30
A-4.60 μc charge is moving at a constant speed of 6.80×105 m/s in the +x−direction relative to a reference frame. at the instant when the point charge is at the origin, what is the magnetic-field vector it produces at the following points.
Answers: 3
Physics, 22.06.2019 07:40
Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents
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Physics, 22.06.2019 19:00
Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?
Answers: 1
Physics, 23.06.2019 01:10
Calculate 9 ∙ 10-5 divided by 3 ∙ 10-9. (box after the "10" in answer is for the
Answers: 1
A28 kg rock approaches the foot of a hill with a speed of 15 m/s. this hill slopes upward at a const...
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