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JulijaS [17]
2 years ago
13

A machine lifts a 1000 N object 40 meters in 15 seconds. How much work is done by the machine

Physics
1 answer:
patriot [66]2 years ago
6 0

Answer:

40000 J or 40 kJ

Explanation:

Work is the net force times the distance.

W = Fd

W = (1000 N) (40 m)

W = 40000 J

Notice that the time doesn't affect the amount of work done.

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Two rings of radius 5 cm are 15 cm apart and concentric with a common horizontal -axis. The ring on the left carries a uniformly
Lina20 [59]

Answer:

Explanation:

Radius of ring r = .05 m

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electric field due to first ring at middle point or at x = 7.5 cm

E = 9 x 10⁹ x 33 x 10⁻⁹ x 7.5 x 10⁻² / ( 7.5² + 5² )³/² x 10⁻³

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=  30.41 N/C

The same field will be created by the other ring at the middle point because charge on the ring is same in magnitude . Due to negative charge on the second ring , field due to both the rings will align in the same direction.

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7 0
3 years ago
A fast teaub abd a ski train driving from city a and city b face to face the fast train has a speed of 76km/h, the slow train ha
LekaFEV [45]

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<h3>Time of motion when the two trains meet</h3>

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(Va - Vb)t = d

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(76 - 65)t = 40

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t = 40/11

t = 3.64 hr

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<h3>Distance traveled by the slow train</h3>

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The distance between the two cities = 276.64 km + 236.6 km

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Learn more about relative velocity here: brainly.com/question/17228388

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1 year ago
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The total amount of energy always stays the same because of the law of conservation of energy, meaning that there is always the same amount of energy, it just gets turned into different forms like potential energy, kinetic energy, sound, thermal, etc.

7 0
2 years ago
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