The only definite number we can tell you is that in order to lift
a 100kg box, you have to somehow provide a force of about
980 newtons (about 220 pounds) pointing upward. That's the
weight of the box, and you have to lift with at least that much force
just to get the box off the ground.
After that, the answer to your question is 'YES'. The time it takes
depends on how much force you have available, how far you want
to lift the box, and how fast.
Here are the Physics formulas you have to use:
-- The amount of "Work" you'll do is
(the amount of force you use) times (how far up you lift the box) .
-- The "Power" (amount of watts) you'll use is
(the amount of 'work' you do) divided by (the length of time it takes).
So ...
-- The higher you lift the box, the more 'work' your lift-machine does.
-- The faster the box is lifted, the more 'power' your lift-machine needs.
Answer:
209 m
Explanation:
The y-component of a vector is the magnitude times the sine of the angle.
y = 253 sin 55.8°
y = 209
Power is the rate of work or energy. It has units of Watts. For an electrical circuit, it can be calculated by multiplying the voltage and the current flowing. Ampere represents the amount of electricity while voltage represents the force of the electricity flowing. We calculate as follows:
P = IV
P = 1 A (5x10^2 V)
P = 5x10^2 W
Fireworks is a good example of chemical reaction. The color change and heat associated with fireworks result in chemical reactions. Chemical reactions can not be reversed. The correct option is C.