Question

**10**. A roller coaster reaches the top of the steepest hill with a speed of 5.40 km/h. It then descends the hill, which is at an average angle of 20° and is 55.0 m long. What will its speed be when it reaches the bottom? Assume µ_{k} = 0.12.

Step 1

10)

Write the expression for the difference between the force of gravity and frictional force will be equal to the net force acts on the roller coaster.

Step 2

Substituting the values, to find the acceleration,

Step 3

Write the expression for e...

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