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patriot [66]
2 years ago
11

A child is sliding on a sled at 1.6m/s to the right. You stop the sled by pushing on it for 0.60s in a direction opposite to its

motion. If the mass of the child and sled is 37kg , what is the magnitude of the average force you need to apply to stop the sled
Physics
1 answer:
ella [17]2 years ago
4 0

Answer:

F = 98.67 N

Explanation:

Given that,

The initial velocity of the sled, u = 1.6 m/s

The mass of the child and the sled is 37 kg

The sled stops pushing on it for 0.60s in a direction opposite to its motion.

We need to find the magnitude of the average force you need to apply to stop the sled.

Impulse = change in momentum

We have, v = 0

Ft=m(v-u)\\\\F=\dfrac{-mu}{t}\\\\F=\dfrac{-37\times 1.6}{0.6}\\\\F=-98.67\ N

So, the magnitude of the average force is 98.67 N.

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Discuss what in particular makes the light bulb a non-ohmic resistor. Specifically, how does temperature affect resistance? Can
bagirrra123 [75]

Answer:

the loss of energy due to the Joule effect is the cause of the non-ohmic characteristic of the bulb

Explanation:

A resistance is formed of some type of metal, in a light bulb it is Tungsten, which for low current is a resistance that complies with the ohm law.

When the value of the current is increased the shock of the electors creates a Joule effect, which heats the metal, these shocks are due to atomic imperfections of the structure, this heating creates a loss of energy of the system that causes the characteristic to be lost linear between the voltage and the current, since the total energy balance must be preserved.

An approximate measure of the energy that is emitted is given by Stefan's law.

In short, the loss of energy due to the Joule effect is the cause of the non-ohmic characteristic of the bulb

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3 years ago
Calculate the amount of work done to draw a current of 8A from a point at 100V to a point at 120V in 2 seconds?
Morgarella [4.7K]
Given:
I=8A
t=2second
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3 0
3 years ago
In an area in which electricity costs 8 cents/kilowatt-hour, a 5 kW clothes dryer runs for 90 minutes to dry a load of laundry.
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$0.60
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Which process is the most scientifically plausible explanation for how the organisms released oxygen into Earth's atmosphere? Gr
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Answer:

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Explanation:

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A particle with charge -40.0nC is on the x axis at the point with coordinate x=0 . A second particle, with charge -20.0 nC , is
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A particle with charge -40.0nC is on the x axis at the point with coordinate x=0 . A second particle, with charge -20.0 nC, is on the x axis at x=0.500 m.

No, there is no point at a finite distance where the electric potential is zero.

Hence, Option D) is correct.

What is electric potential?

Electric potential is the capacity for doing work. In the electrical case, a charge will exert a force on some other charge and the potential energy arises. For example, if a positive charge Q is fixed at some point in space, any other positive charge when brought close to it will experience a repulsive force and will therefore have potential energy.

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1 year ago
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