The average power output is the ratio between the work done to compress the spring, W, and the time taken, t:
(1)
The work done is equal to the elastic energy stored by the compressed spring:
where
is the spring constant and
is the compression of the spring. If we substitute the numbers, we find:
And now we can use eq.(1) to calculate the average power output:
I think it’s R=U/I = 120/5 = 24
<span>The range of an object thrown at a velocity v with an angle of elevation 45 degrees is S = v^2/g
100 = v^2/g
=> v^2 = 100*g
In the same throw, the maximum height of the ball can be derived from the equation v^2 - u^2 = 2*g*h
It is is h = =
= 50 metres</span>
How the physical world operates.
Answer:
Explanation:
Work is the product of force and distance.
The force is 500 Newtons and the couch is raised 12 meters above the ground.
Substitute these values into the formula.
Multiply.
- 1 Newton meter is equal to 1 Joule.
- So, our answer of 6000 N*m equals 6000 J
The work done to move a 500 Newton couch 12 meters is <u>6000 Joules</u>. Therefore, choice D is correct.
