An unbanked circular highway curve on level ground makes aturn
of 90 degrees. the highway carries traffic at 60 mi/hr, andthe
centripetal force on a vehicle is not to exceed 1/10 of itsweight.
what is the minimum length of teh curve in miles?

Explanation:

Given

Velocity of traffic

Maximum value of Centripetal force is one-tenth of weight

such that

to make a safe turn centripetal force with radius of curvature r is given by

the aurora is formed when charged particles emitted from the sun during a solar flare penetrate the earth's magnetic shield and collide with atoms and molecules in our atmosphere. these collisions result in countless little bursts of light, called photons, which make up the aurora.

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