The correct answer is - Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
Answer:
B
Explanation:
Adding a dopant is correct on edge.
No because there must be an even # if their is an even amount one of the forces isn’t being cancelled
Formula for final velocity: Vf= vi+(a*t)
Vi- initial velocity, a=acceleration, t-time
Vf=vi+(at)
Vf= 0+(9.8m/s*2.8s)
Vf= 27.44 m/s
The acceleration of the Earth when dropping something would be 9.8 m/s
Here is an reference that can help you answer problems like these.
Hope this helps and good luck :)