Physics, 25.12.2019 05:31 lyndamahe0
Alarge sphere rolls without slipping across a horizontal surface. the sphere has a constant translational speed of 10 meters per second. a mass m of 25 kilograms, and a radius r of 0.2 meter. the moment of inertia of the sphere about its center of mass is i = 2mr^2/5. the sphere approaches a 25 degree incline of height 3 meters as shown above and rolls up the incline without slipping. calculate the total kinetic energy of the sphere as it rolls along the horizontal surface. calculate the magnitude of the sphere's velocity just as it leaves the top of the incline. specify the direction of the sphere's velocity just as it leaves the top of the incline. neglecting air resistance, calculate the horizontal distance from the point where the sphere leaves the incline to the point where the sphere strikes the level surface. suppose, instead, that the sphere were to roll toward the incline as stated above, but the incline were frictionless. state whether the speed of the sphere just as it leaves the top of the incline would be less than, equal to, or greater than the speed calculated in (b). explain briefly
Answers: 3
Physics, 21.06.2019 18:10
Keneila is attempting to ski down a 20 m high friction free hill for the first time. she has a speed 10 m/s at the top. what is her kinetic energy when she is a the bottom, 20 m ? (a)2500 j (b)9800 j (c)12300 j (d)3100j (e)15000j
Answers: 2
Physics, 22.06.2019 11:30
Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?
Answers: 3
Physics, 22.06.2019 16:40
The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
Answers: 3
Alarge sphere rolls without slipping across a horizontal surface. the sphere has a constant translat...
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