The work required to move a box a particular distance is 300 J. How much power is required to move the box in 3 seconds?
1 answer:
Given:
Work = 300 Joule
time = 3 second
To find:
Power required to move a box = ?
Formula used:
P =
Where P = power required to move box
W = work done to move the box
t = time taken to move the box
Solution:
Power required to move the box is given by,
P =
Where P = power required to move box
W = work done to move the box
t = time taken to move the box
P =
P = 100 Watt
Thus, Power required to move the box for 3 second is 100 Watt.
Hence, Option (B) is correct.
You might be interested in
Answer:
4.5 m/s
Explanation:
The rock must barely clear the shelf below, this means that the horizontal distance covered must be
while the vertical distance covered must be
The rock is thrown horizontally with velocity , so we can rewrite the horizontal distance as
where t is the time of flight. Re-arranging the equation,
(1)
The vertical distance covered instead is
where we omit the term since the initial vertical velocity is zero. From this equation,
(2)
Equating (1) and (2), we can solve the equation to find :