Should the kinetic coefficient of friction and the static coefficient change with a different mass

Physics

1 answer:

dusya [7]3 years ago

8 0

Explanation:

No. Surface contact area also no. The main issue is the types of materials in contact. Surface roughness somewhat matters. Certain surfaces such as ice are special in that pressure melts the ice.

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The collective body of observations of a natural phenomenon on which scientific explanations are based is called?

zhenek [66]

Experimental Evidence.

Scientists conduct experiments or observations to gather evidence that either support or disprove a given hypothesis. Hence, all the scientific explanations are based on this body of observations.

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A car accelerates from rest at -3.00m/s^2. What is the velocity at the end of 5.0s? What is the displacement after5.0s?

Andrew [12]

Speed = (acceleration) x (time)
Velocity = (speed) in (direction of the speed)

Speed = (-3 m/s²) x (5 s) = 15 m/s
Velocity =
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Displacement = (distance between start-point and end-point)
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Distance = (1/2) (acceleration) (time)²
Distance = (1/2) (3 m/s²) (5 s)²
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Displacement =
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3 years ago

Which tool would you use to measure how long it takes a toy car to go down a ramp?

Ratling [72]

The answer will be C, a stopwatch :)

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1.How can you conserve water in the kitchen?

PIT_PIT [208]

Instead of washing vegetables in running water, fill a bowl of water and wash inside the bowl.

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Which objects will likely have the smallest gravitational force between them?

DENIUS [597]

Answer:

A. Two tennis balls that are near each other

Explanation:

The formula for gravitational force (F) between two objects is

$F = \dfrac{Gm_{1}m_{2}}{d^{2} }$

where m₁ and m₂ are the masses of the two objects, d is the distance between their centres, and G is the gravitational constant.

Thus, two objects that are far from each other will have a smaller gravitational force. We can eliminate Options C and D.

If the objects are at the same distance, those with the smaller mass will have a smaller force.

The mass of a tennis ball is 57 g.

The mass of a soccer ball is 430 g.

Two tennis balls that are near each other will have a smaller gravitational attraction.

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