The total mechanical energy is the sum of the kinetic energy and the gravitational potential energy:
where m=3.5 kg is Candy's mass, v=1 m/s is her velocity and h=3.5 m is her height. If we replace these numbers, we find the mechanical energy of the system:
Y = +1-3 = -2
X = -5+7 = +2
D = √2^2-2^2 = 2√1+1 = 2√2 km
Answer:
The difference in the amount of energy transferred by the two bulbs is 1200 J.
Explanation:
The energy transferred by the two lightbulbs can be calculated with the given equation:
Where P is the power and t is the time
For the 60 W lightbulb:
For the 100 W lightbulb:
Hence, the difference in the amount of energy transferred is:
Therefore, the difference in the amount of energy transferred by the two bulbs is 1200 J.
I hope it helps you!
Answer: The work done on the flagstone is 20178 J
Explanation:
Power is the rate at which work is done . It is equal to the amount of work done divided by the time it takes to do the work.
Given : work = ?
Power = 342 W = 342J/s
Time = 59 s
Thus the work done on the flagstone is 20178 J
