Question

CALCULATE: Ken is a bicyclist. He is moving from point C to point D up a hill. His starting velocity is 8m/s east and 1 second later, his final velocity is at 7m/s east. What is his average acceleration? HINT: use the acceleration formula. A. 1 m/s^2. B. 7.5 m/s^2east. C. -1m/s^2 east. D. 10 m/s^2east.

Answer 1

Answer:

C. -1m/s² east

Explanation:

starting velocity u= 8m/s

final velocity  v=7m/s

time t=1second

we know,

average acceleration=(v-u)/t

                                   ={ (7-8)/1 } m/s²

                                   =(-1/1 ) m/s²

                                    =-1 m/s²

the result is negative because his  final velocity is less than  starting velocity. That means there will be deceleration instead of acceleration.