Physics, 23.01.2020 00:31 neelydeY23

Arope is lying on the floor and has a mass which applies a force of 3 n/m. how much work is required to raise one end of the rope to a height of 2 meters?

Answers: 1

Show answers

Answers

Answer from: chjam265

The work required to raise one end of the rope to a height of 2 meters with an applied force of 3 N is 6 joules.

We can calculate the work required to raise one end of the rope to a height of 2 meters as follows:

$W = F*d*cos(\theta)$

Where:

F: is the force exerted = 3 N (newton: unit of force)

d: is the displacement = 2 m

θ: is the angle between the applied force and the displacement

Since the force and the displacement are in the same direction, θ = 0, so:

$W = F*d*cos(\theta) = Fdcos(0) = F*d$

Hence, the work done is:

W = 3 N*2m = 6 J

Therefore, it is required 6 J of work.

You can see another example of work calculation here: link

I hope it helps you!

Answer from: 76022sfox

At least 6 N, assuming that the rope has a length of more than 2 meters.

Explanation:

In general, if it takes a force of F(h) newtons to lift an object at height , the work done lifting the object from h = a to h = b can be found using the definite integral about :

$\displaystyle W = \int \limits_{a}^{b} F(h)\, dh$ .

If the value of F(h) is a constant $m \cdot g$ regardless of height , then the result of the integral would be

$\displaystyle \int \limits_{a}^{b} (m \cdot g)\, dh = \left[m \, g\, h \right]_a^b = m\cdot g \, (b - a)$ .

However, in this case the value of F(h) does depend on the value of .

At height $h = 0\; \rm m$ , nothing is being lifted. The amount of force required would be zero. At height $h = 1\; \rm m$ , one meter of the rope is in the air. That requires a force of at least $1\; \rm m \times 3\; N \cdot m^{-1} = 3\; N$ .In general, at a height of

meters, the force required would be at least $3\, h$ Newtons.

In other words, $F(h) = 3\; h$ where is in Newtons and is in meters.

Evaluate the integral:

$\begin{aligned} W &= \int \limits_{a}^{b} F(h)\, dh \cr &= \int \limits_{0}^{2}3\, h \, dh && \text{Apply the power rule.}\cr &= \left[\frac{3}{2}\,h^2\right]_{0}^{2}\cr &= \frac{3}{2} \times 2^2 \cr &= 6\end{aligned}$ .

Arope is lying on the floor and has a mass which applies a force of 3 n/m. how much work is required

Answer from: Quest

This did i unseated, sorry

Answer from: Quest

The best answer is (a) which is universal law is in effect at all times. it is constantly at play in everything we do and governs our lives. it is also important to note that universal law applies to not only everything on earth, but everything in the universe as well, which is another reason why it is in effect at all times.

Another question on Physics

Physics, 22.06.2019 00:30

Which type of wave can travel without a medium

Answers: 1

Answer

Physics, 22.06.2019 19:30

Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)

Answers: 3

Answer

Physics, 22.06.2019 20:00

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?

Answers: 3

Answer

Physics, 22.06.2019 21:10

A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)

Answers: 3

Answer

You know the right answer?

Arope is lying on the floor and has a mass which applies a force of 3 n/m. how much work is required...