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Arisa [49]
3 years ago
10

Twins Jody and Taylor are rearranging the furniture in their bedroom and want to move a dresser across the room. The dresser has

a sliding force of 90N. Jody can push with a force of 55N and Taylor can push with a force of 38N. What is the Net Force? Can the twins move the dresser across the room? Explain why in complete sentences and show all math work to support your answer.
Plz help this is due in 5 days ;-;
Physics
1 answer:
xeze [42]3 years ago
7 0

Answer:

yes, They will be able to move the dresser.

Explanation:

sliding force 90N

55N + 38N = 93N

therefore, yes the twins can move the dresser

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maxonik [38]
The formula is

F_grav = G * m1 * m2 / r^2

G m1 and m2 are going to stay the same once chosen no matter what the distance is. The only thing that will change is the distance.

As the distance increases, the Gravitational Force will decrease. It will decrease by quite a bit.

As the distance decreases, the gravitational force will Increase.

The relationship is inverse. The moon travelling around the earth is one example. The earth travelling around the sun is another.
8 0
3 years ago
To drive a typical car at 40 mph on a level road for one hour requires about 3.2 × 107 J of energy. Suppose we tried to store th
tatiyna

Answer:

9000RPM

Explanation:

"Angular velocity" is directly related to kinetic energy, that is, the Kinetic energy equation would allow an approximation to the resolution investigated in the problem.

The equation for KE is given by:

KE = \frac{1}{2} lw ^ 2

Now, starting from there towards the <em>Angular equation of kinetic energy</em>, the moment of inertia (i) is used instead of mass (m), and angular velocity (w) instead of linear velocity (V)

That's how we get

KE_{Angular} = \frac{1}{2} Iw^2

calculating the inertia for a solid cylindrical disk, of

m = 400kg

r = 1.2 / 2 = 0.6m

I_{disk} = \frac{1}{2} mr^2 = (0.5) (400) (0.6)^2 = 72 kgm^2

We understand that the total kinetic energy is 3.2 * 10 ^ 7J, like this:

3.2*10^7 = \frac{1}{2} Iw^2 = (0.5) (72) w^2 = 36w^2w^2 = 3.2*10^7 / 36 = 0.0888*10^7 = 88.8*10^4

w = 9.43*10^2 = 943 rad / s

Thus,

943 rad / s ≈ 9000 rpm

6 0
3 years ago
A solenoidal inductor for a printed circuit board is being redesigned. To save weight, the number of turns is reduced by one-fif
AlladinOne [14]

The "it must be five times larger" current change if the energy stored in the inductor is to remain the same.

<u>Explanation:</u>

A current produced by a modifying magnetic field in a conductor is proportional to the magnetic field change rate named INDUCTANCE (L). The expression for the Energy Stored, that equation is given by:

U= \frac{1}{2} LI^2

Here L is the inductance and I is the current.

Here, energy stored (U) is proportional to the number of turns (N) and the current (I).

L = \frac{\mu_0 N^2 *A}{l}

mu not - permeability of core material

A -area of cross section

l - length

N - no. of turns in solenoid inductor

Now,given that the proportion always remains same:

\frac{N_2}{N_1} = \frac{I_1}{I_2}

In this way the expression

\frac{1}{5} = \frac{I_1}{I_2}

I_2 = I_1 \times 5

Thus, it suggest that "it must be five times larger" current change if the energy stored in the inductor is to remain the same.

8 0
3 years ago
"Consider the Earth and the Moon as a two-particle system. (a) How far from the center of the Earth is the gravitational field o
olga55 [171]

a is the correct

Explanation:

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3 0
3 years ago
A mass m is attached to an ideal massless spring. When this system is set in motion, it has a period t. What is the period if th
Blizzard [7]

If a mass m is attached to an ideal massless spring and has a period of t, then the period of the system when the mass is 2m is \sqrt{2}t.

Calculation:

Step-1:

It is given that a mass m is attached to an ideal massless spring and the period of the system is t. It is required to find the period when the mass is doubled.

The time it takes an object to complete one oscillation and return to its initial position is measured in terms of a period, or T.

It is known that the period is calculated as,

T=2 \pi \sqrt{\frac{m}{k}}

Here m is the mass of the object, and k is the spring constant.

Step-2:

Thus the period of the system with the first mass is,

t=2 \pi \sqrt{\frac{m}{k}}

The period of the system with the second mass is,

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Then the period of the system with the second mass is \sqrt{2} times more than the period of the system with the first mass.

Learn more about period of a spring-mass system here,

brainly.com/question/16077243

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