Ask question

Ask question

All categories

3 years ago

6

Amy is holding one end of a jump rope. Her friend Beth is holding the other end of the rope. Amy swiftly moves the handle of the

jump rope downward, creating a large wave in the rope.
Will Beth feel a tug on the rope at her end?

2 answers:

Anuta_ua [19.1K]3 years ago

6 0

Yes Beth will feel a tug on the rope at her end! :D

Umnica [9.8K]3 years ago

3 0

Yes. If a downward force is created, it will be felt at the end of the rope as well.

You might be interested in

When the displacement of a mass on a spring is 12 A, what percentage of the energy is kinetic energy?

Zolol [24]

Answer:

1.44%

Explanation:

The potential energy of a spring is given by

$U=\dfrac{1}{2}kx^2$

The kinetic energy is

$E=\dfrac{1}{2}kA^2$

Now x = 12 A

Applying in the first equation

$U=\dfrac{1}{2}k(12A)^2\\\Rightarrow U=\dfrac{1}{2}k144A^2\\\Rightarrow U=144\dfrac{1}{2}kA^2\\\Rightarrow U=144E$

The percentage would be 14400%

at $x=\dfrac{1}{2}A$ (makes more sense)

$U=\dfrac{1}{2}k(\dfrac{1}{2}A)^2\\\Rightarrow U=\dfrac{1}{2}k\dfrac{1}{4}A^2\\\Rightarrow U=\dfrac{1}{4}\times \dfrac{1}{2}kA^2\\\Rightarrow U=0.25E$

The percentage is 25 % of the kinetic energy

6 0

3 years ago

What property of objects is best measured by their capacitance?

vekshin1

<h2>Answer: the object's ability to store charge</h2>

Explanation:

The capacitance $C$ is defined as the relationship between the electric charge of each conductor and the potential difference between them. That is, it is the capacity of a device to store electrical charge.

In other words:

It is the property that bodies have to maintain an electric charge.

Mathematically it is defined as:

$C=\frac{Q}{V}$

where:

$C$ is the capacitance value of a capacitor. Its unit is Farad $F$ ; named in honor of the physicist Michael Faraday

$Q$ is the electric charge of the conductor, measured in coulombs $C$ .

$V$ is the electric potential to which the conductor is located, measured in Volt.

3 0

3 years ago

In midair an M = 145 kg bomb explodes into two pieces of m1 = 115 kg and another, respectively. Before the explosion, the bomb w

Daniel [21]

Answer:

$v_2=-133.17m/s$ , the minus meaning west.

Explanation:

We know that linear momentum must be conserved, so it will be the same before ( $p_i$ ) and after ( $p_f$ ) the explosion. We will take the east direction as positive.

Before the explosion we have $p_i=m_iv_i=Mv_i$ .

After the explosion we have pieces 1 and 2, so $p_f=m_1v_1+m_2v_2$ .

These equations must be vectorial but since we look at the instants before and after the explosions and the bomb fragments in only 2 pieces the problem can be simplified in one dimension with direction east-west.

Since we know momentum must be conserved we have:

$Mv_i=m_1v_1+m_2v_2$

Which means (since we want $v_2$ and $M=m_1+m_2$ ):

$v_2=\frac{Mv_i-m_1v_1}{m_2}=\frac{Mv_i-m_1v_1}{M-m_1}$

So for our values we have:

$v_2=\frac{(145kg)(24m/s)-(115kg)(65m/s)}{(145kg-115kg)}=-133.17m/s$

5 0

3 years ago

A wire carries a 2a current. what is the current in a second wire that delivers twice as much charge in the same amount of time?

Soloha48 [4]

Answer:

4A

Explanation:

Current is charge per time. So if the second wire delivers twice as much charge in the same amount of time, it must have twice the current.

2 × 2A = 4A

7 0

3 years ago

Winds are named based on different factors. How are winds usually named?

eduard

Winds are named based on which compass direction the wind is blowing. For example some common ones are NE or N or SE or SW. NE stands for Northeast, N for North, SE for South East and SW for Southwest.

4 0

3 years ago