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Eva8 [605]
2 years ago
12

Which example provides a complete scientific description of an object in motion? the vibration of the jackhammer broke through t

he south-facing rock in under 10 seconds. the hockey player sent the puck flying toward the north goal to score the winning point. the tiger had to run at 50 kilometers for hour across the field to catch the zebra. the hiker followed the north trail a distance of two kilometers in thirty minutes.
Physics
2 answers:
ivann1987 [24]2 years ago
3 0

The hiker followed the north trail a distance of two kilometers in thirty minutes is an example that provides a complete scientific description of an object in motion.

KatRina [158]2 years ago
3 0

the hiker followed the north trail a distance of two kilometers in thirty minutes

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A lawn roller in the form of a thin-walled, hollow cylinder with mass M is pulled horizontally with a constant horizontal force
olga nikolaevna [1]

Answer:

a_{cm}=\frac{F}{2M}\\\\F_{fr}=\frac{F}{2}

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\sum F_x=Ma_x, -F+F_{fr}=-Ma_{cm}\\\\a_{cm}=\frac{F-Fr}{M}    \ \ \ \ \ \ \ \ eqtn1\\\\\sum \tau_{cm}=I_{cm}\alpha, F_{fr}(R)}=(MR^2)(\frac{a_{cm}}{R}), ->F_{fr}=Ma_c_m\ \ \  \ \ \ \ eqtn2\\\\a_{cm}=\frac{F-Ma_{cm}}{M}, ->F=2Ma_{cm}\\\\a_{cm}=\frac{F}{2M}\\\\\\\therefore F_{fr}=M(\frac{F}{2M})\\\\F_{fr}=\frac{F}{2}

6 0
3 years ago
Any help guys? I am stuck on two problems.
Juli2301 [7.4K]

Ax=A*Cos56

   = 20*(0.559)

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