Question

As she climbs a hill a cyclist slows down from 25mi/hr to 6mi/hr 10 seconds. What is her deceleration?

Answer 1

-a = 6mh⁻¹ -25 mh⁻¹ / 10s

-a = - 1.9 m h⁻¹ s⁻¹

-a = - sign indicate deceleration.