Question

A roller coaster is moving at 25m/s at the bottom of a hill. Three seconds later it reaches the top of the hill moving at 10m/s. What was the acceleration of the coaster

Answer 1

`5 m/s^(2)`

Step-by-step explanation:

acceleration is defined as the rate of change of velocity per unit time. Therefore, acceleration,
`a=\frac {\triangle v}{\triangle t}`

where
`\triangle v` is change in velocity and t is time

Substituting initial and final velocities with 25 m/s and 10 m/s then using time as given in the question of 3 s then

`a=\frac {25-10}{3}=\frac {15}{3}=5 m/s^(2)`

Therefore, the acceleration is
`5 m/s^(2)`