Hi there!
Recall the following relationships:
W = Work (J)
U = Potential Energy (J)
m = mass (kg)
g = acceleration due to gravity (9.8 m/s²)
h = height (m)
t = time (s)
Begin by calculating the work:
Now, divide by the time to solve for power:
**W is the unit for power (Watts). Be careful not to get the two confused.
Answer:
q(ice) = -q(warm water)
Explanation:
Ice removes energy if ice is put in warm water and ice retains the very same amount of energy. Thus the water temperature heat sign is negative, and the ice heat sign is positive.
0.4375 m/s^2
Acceleration is change in velocity over time
Change in velocity (Vf-Vi) 9.7m/s - 6.2m/s = 3.5 m/s
Time is 8 seconds
Acceleration = 3.5m/s / 8s = 0.4375 m/s^2
