A roller-coaster car shown in the figure is pulled up to point 1 where it is released from rest. (Figure 1) Figure 32 m 2 4 < 1 of 1 26 m 14 m Submit Part B Assuming no friction, calculate the speed at point 3. Express your answer to two significant figures and Include the appropriate units. V3 = Submit Part C V4 = Request Answer Submit μà Value Provide Feedback Request Answer Assuming no friction, calculate the speed at point 4. Express your answer to two significant figures and include the appropriate units. HA Value Units Request Answer ? Units ?

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Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.