Question

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

Answer 1

`-5m/s^2`, the negative sign is an indication that the roller coaster is decelerating.

Step-by-step explanation:

Acceleration or deceleration is define as the rate of change in the velocity of a body. It is given by the following relationship;

`a=(v-u)/(t)............(1)`

where v is the final velocity, u is the initial velocity and t is the time taken.

Given,

v = 10m/s

u = 25m/s

t = 3s

hence

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