If a runner exerts 457 j of work to make 321 w of power then how long did it take the runner to do the work
1 answer:
The time taken by the runner to do the work is 1.42 seconds.
Given the data in the question;
- Work done;
- Power;
- Time elapsed;
Power can be simply referred to as the quantity of energy transferred per unit time.
It is expressed as;
Where W is work done and t is time elapsed.
To determine the time it took the runner to do the work, we substitute our given values into the expression above.
Therefore, the time taken by the runner to do the work is 1.42 seconds.
Learn more about Power and Work: brainly.com/question/2962104
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Answer:
5m/s²
Explanation:
Given parameters:
Initial velocity = 15m/s
Final velocity = 25m/s
Time taken = 2s
Unknown:
Acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time taken. It is mathematically expressed as;
Acceleration =
Acceleration = = 5m/s²
The electric field between two parallel metal plates is given by
where
E is the electric field
V is the voltage across the two plates
d is the separation between the two plates.
In our problem, the voltage is
while the separation between the plates is 
, therefore the magnitude of the electric field is
where
E is the electric field
V is the voltage across the two plates
d is the separation between the two plates.
In our problem, the voltage is