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3 years ago

Why does the rider continue to go the same height on the ramp every time and would continue to do that forever?

1 answer:

3 0

It’s called conservation of energy. The system (the rider) can’t randomly gain energy without something else giving it energy because energy can’t be created or destroyed, only transferred. The pendulum example is beyond popular and you see physics professors doing it all the time. I think your teacher wants you to say it’ll continue forever, but I don’t think it will. The system will most likely lose energy to its surroundings. And there’s things like air resistance which will, overtime, slow it down. So no, it won’t go on forever

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Please help, thank you!

VARVARA [1.3K]

gurlll this need way more points

8 0

3 years ago

Calcula el tiempo que tarda en llegar a la Tierra la luz del sol si viaja a 300.000 km/s sabiendo que la distancia del sol a la

Strike441 [17]

Calculate the time it takes for sunlight to reach Earth if it travels at 300,000 km / s, knowing that the distance from the sun to the earth is 150,000,000 km. Express it in minutes

Answer:

8.3min

Explanation:

Given parameters:

Speed of sunlight = 300000km/s

Distance of sun and earth = 150000000km

Unknown:

Time in minutes = ?

Solution:

To solve this problem;

Speed = $\frac{distance }{time}$

Time = $\frac{distance}{speed}$

Now insert the parameters and find the speed;

Time = $\frac{150000000}{300000}$ = 500s

Now;

60s makes 1 minute

500s will give $\frac{500}{60}$ = 8.3min

5 0

3 years ago

One wire in a circuit is replaced by a wire that conducts less electricity. which unit describes the difference in conduction be

Orlov [11]

Conductivity of two wires is compared by the resistance of wires

Resistance is measured in unit "ohm".

If resistance of a wire will be more then it will conduct less electricity.

So if a wire in the circuit is replaced by another wire then current will be less if more resistance of wire will be there.

So wire conducts less electricity then its resistance will be more

6 0

3 years ago

Suppose a metal sphere is launched up a ramp with Vi=1.5 m/s. The end of the ramp is 1.20 m above the floor. The ramp is at an a

Mekhanik [1.2K]

The sphere will go up until all the initial kinetic energy be transformed into potential energy.

Intital kinetic energy = m*(vi)^2 / 2

Final potential energy = mgh

mgh = m(vi)^2 / 2 => h = (vi)^2 / (2g)

g = 9.81 m/s^2
vi = (1.5m/s)^2

h = (1.5m/s)^2 / (2*9.81m/s)^2 = 0.115 m

The range is the distance run over the ramp

Using trigonometry, sin(20°) = h /run => run = h / sin(20) = 0.115m / sin(20) = 0.336 m

Answer: 0.336 m

3 0

4 years ago

A box on a ramp is connected by a rope to a winch. The winch is turned so that the box moves down the ramp at a constant speed.

Marrrta [24]

Answer:

Option B:

The normal force

Explanation:

The normal force does no work as the box slides down the ramp.

Work can only be done when the force succeeds in moving the object in the direction of the force.

All the other forces involved have a component that is moving the box in their direction.

However, the normal force does not, as it points downwards into the ramp. Since the normal force is pointing into the ramp, and the box is sliding down the ramp, we can say that no work is being done by the normal force because the box is not moving in its direction (which would have been the box moving into the ramp)

7 0

4 years ago