If a car takes a banked curve at less than the ideal speed, friction is needed to keep it from sliding toward the inside of the curve (a real problem on icy mountain roads). (a) Calculate the ideal speed in (m/s) to take a 110 m radius curve banked at 15°. 16.99 Correct: Your answer is correct. m/s

ideal speed(v)≅17m/s

Explanation:

Given: Radius, r = 110 m

Angle(α) = 15°

g=9.81m/

Find; (a) The ideal speed, v.

tanα=

make V subject of the formula;

v=

v=

v=

v≅17m/s

answer: i pick a

explanation:

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.