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1 year ago

9

If it takes you 10 seconds to move a chair 5 meters across the floor, using a force of 2 Newtons, how much power did you put out

?
20 joules per second

100 joules per second

O 1 joules per second

4 joules per second

1 answer:

Maru [420]1 year ago

5 0

Answer:

power=work done÷time taken

2×5=10

10÷10=1

ans 1J per second

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horsena [70]

Answer:

a) $\Delta x=56.25 m$

b) imagen adjunta

Explanation:

a) Primero debemos hacer la conversión de 81 km/h a m/s, esto es 22.5 m/s.

Ahora, usando la ecuacion cinemática, en un movimiento acelerado tenemos:

$v_{f}^{2}=v_{0}^{2}+2a \Delta x$

Queremos encontrar la posición hasta detenerse, osea vf = 0.

$\Delta x=\frac{-v_{0}^{2}}{2a}$

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$\Delta x=56.25 m$

b) Para este caso el gráfico se encuentra adjunto.

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3 years ago

A plane flies 1800 miles in 9 hours, with a tailwind all the way. the return trip on the same route, now with a headwind, tak

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Initially its moving with tail wind so here the speed of wind will support the motion of the plane

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$V_{plane} + v_{wind} = \frac{distance}{time}$

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$V_{plane} + v_{wind} = 200 mph$

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$V_{plane} - v_{wind} = \frac{1800}{12}$

$V_{plane} - v_{wind} = 150mph$

now by using above two equations we can find speed of palne as well as speed of wind

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3 years ago

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2 years ago

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Answer:

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$R = \frac{mv}{qB}$

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2 years ago

A geneticist looks through a microscope to determine the phenotype of a fruit fly. The microscope is set to an overall magnifica

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Answer:

$f_e = 1.51 cm$

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3 years ago