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3 years ago

How much work is done by the force of gravity when a 45 N object falls to the ground from a height of 4.6 m?

Physics

2 answers:

saul85 [17]3 years ago

5 0

Work Done = 45N x 4.6m = 207J

shutvik [7]3 years ago

4 0

Answer:

207Nm

Explanation:

Work on said to be done when an applied force causes an object to move through a particular distance. mathematically,

Work done = Force(f)×distance in the direction of force.

Given force of gravoty = 45N

Height = corresponding Distance= 4.6m

Work done = 45×4.6

Work done= 207Nm

This shows that 207Nm of work is done by the force of gravity when a 45 N object falls to the ground from a height of 4.6 m.

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Two parallel wires run in a north-south direction. The eastern wire carries 15.0 A northward while the western wire carries 6.0

djyliett [7]

Answer:

The magnitude and direction of the magnetic field is 2.7 x 10⁻⁵ T upwards

Explanation:

Given;

current in the eastern wire, $I_e$ = 15 A

current in the western wire, $I_w$ = 6 A

distance between the wires, d = 30 cm = 0.3 m

The magnetic field at a distance R from a line current I, is given as;

$B = \frac{\mu_o I }{2 \pi R}$

The magnetic field between the wires, are in opposite directions, and since the currents are also in opposite directions, the magnetic fields of the wires will be added.

The total field = magnetic field (east) + magnetic field (west);

$B = \frac{\mu_o I_e}{2 \pi R_e} + \frac{\mu_0 I_w}{2 \pi R_w} \\\\B = \frac{\mu_o}{2\pi} (\frac{I_e}{R_e} + \frac{I_w}{R_w})$

where;

$R_w$ is the distance of the field from west = 10cm = 0.1 m

$R_e$ is the distance of the field on east from west = d - 10cm = 30cm - 10cm = 20cm = 0.2 m

The total magnetic field is;

$B = \frac{\mu_o}{2\pi} (\frac{I_e}{R_e} + \frac{I_w}{R_w})\\\\B = \frac{4\pi *10^{-7}}{2\pi} (\frac{15}{0.2} + \frac{6}{0.1})\\\\B = 2*10^{-7}(75 + 60)\\\\B = 2*10^{-7}(135)\\\\B = 2.7*10^{-5} \ T$

Since total magnetic field is positive, the direction of the field is upwards (positive y direction)

Therefore, the magnitude and direction of the magnetic field is 2.7 x 10⁻⁵ T upwards

3 0

3 years ago

What do you mean by momentum.Explain

r-ruslan [8.4K]

Momentum is the quantity of moving motion if that helps in anyway :)

8 0

3 years ago

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Three dry cells each of emf 2volts are connected in parallel, if a current of 6amperes flowing through the circuit, the total em

Andrej [43]

Answer:nation:

12volts

8 0

3 years ago

Only question 7. I keep getting it wrong and i’m not sure

Akimi4 [234]

Answer:

I think you just have to input the horizontal velocity component.

Explanation:

Assuming no air resistance

The horizontal velocity is constant at

vx = 17.5cos71 = 5.6974... = 5.70 i m/s

The vertical velocity varies with gravity

vy = 17.5sin71 + -9.81(22) = -199.273... = -199 j m/s

v = 5.70i - 199j m/s

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3 years ago

A student went to a hill station early in the morning, he could hear the echo of his clap after 0.1 second. When he went to the

Dahasolnce [82]

Answer:

See the explanation.

Explanation:

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7 0

3 years ago