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Charra [1.4K]
4 years ago
12

does anyone know how to do this? the scenario is ""dominique reads that race cars have wide tires because the increased area of

contact between the tire and the road results in a stronger force of friction. she hypothesizes that the force of kinetic friction on an object is directly proportional to the area of the object in contact with the surface and wants to test this hypothesis. Dominique and Blake take a long wooden plank and cut the plank into pieces that have different lengths but the same width and height. The students also have access to other equipment commonly available in a school physics lab.
Physics
1 answer:
Usimov [2.4K]4 years ago
7 0

Answer:

Stupid

Explanation:

Because there is never a answer when we are trying to find one

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yarga [219]

The correct answer is option A, 3.528 N

In this question the water has nothing to do, the gravity always pull the object with the same magnitude irrespective of the medium.

The force of gravity is calculated as

F=0.09*4000*9.8

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4 years ago
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Use Fnet=ma. Apply it to the vertical components of all the forces acting on the ball and since tension is the same on both wires you should be able to factor it out and solve for it. Picture below

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4 years ago
An isolated conducting sphere has a 12 cm radius. One wire carries a current of 1.0000049 A into it while another wire carries a
tatuchka [14]

Answer:

it will take for the sphere to increase in potential by 1500 V, 503.71 s.

Explanation:

The charge on the sphere after t seconds is:

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t = (R*V) / (0.0000049 k) = (0.12 * 1500) / (0.0000049 * 9e^{9}) = 503.71 s

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Naily [24]

Answer: The correct answer is " longitudinal wave with air molecules

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Explanation:

In longitudinal wave, the particles vibrate parallel to the direction to the propagation of the wave. For example, sound wave is a longitudinal wave.

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In the given problem, a tuning fork vibrates at a frequency of 512 hertz  when struck with a rubber hammer. The sound  produced by the tuning fork will travel through air. Here, a longitudinal wave with air molecules vibrating parallel to the direction of travel.

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3 years ago
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