Abox has a mass of 400 g. what minimum force is needed to lift it? if it is raised to a height of 6.0 m, how much work was done?

We know that the mass of the box is m = 400g, then the weight of the box is equal to the gravitational acceleration times the mass, this is:

w = -9.8*0.4N = 3.92N downwards

Where i used 0.4kg instead of 400g, because the units are easily calculated in kg than in grams. This calculation is obtained by knowing that 1000g = 1kg, then 400g is equal to (400/1000)kg

Now, if you want to lift the box, you need to cancel this force, so you should use a force of at least 3.92N upwards.

And the work is defined as the movement done by a force, and can be calculated as:

W = F*d

in this case the minimal force is F = 3.92N, and the distance is d = 6.0m

And we have W = 3.92N*6.0m = 23.52 joules

the answer is a 3.8cm

explanation:

if i understood you you wish to calculate power from voltage and current.

we have voltage of 220 volts and current of 5.3 amperes. the power is equal to the product of voltage and current.

where p is power, u is voltage and i is current.

so,

hope this .

r3t40