Aload of bricks is lifted to the second floor of a building. how do work and power relate to this job?
a. the longer the job takes, the more work is done.
b. the faster the job is done, the greater the power.
c. the greater the power applied, the more work is done.
d. the less work is done, the more power is needed.

c.The greater the power applied, the more work is done.

Explanation:

The relationship between work done and power is the following:

where

P is the power

W is the work done

t is the time taken

From the formula, we see that the power is directly proportional to the work done: therefore, the greater the power applied, the more work is done, as statement c says.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards