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3 years ago

How would you find force of the ping pong ball rolling down the track?

Physics

1 answer:

Alina [70]3 years ago

6 0

<h3>Force of the ping pong ball rolling down the track:</h3><h3 /><h2>Answer</h2><h3>Weight </h3>

a) weight's vertical component = Normal upward force

b) weight's horizontal component = Friction force = (mass of ball)(acceleration)

These forces depend upon the track,

1) inclined or horizontal

2) steepness.

<h2>Explanation</h2>

The force of gravity points straight down, but a ball rolling down a ramp doesn't go straight down, it follows the ramp. Therefore, only the component of the weight which points along the direction of the ball's motion can accelerate the ball.

<em>weight's horizontal component = Friction force = (mass of ball)(acceleration)</em>

The other component pushes the ball into the ramp, and the ramp pushes back.

If the ramp is horizontal, then the ball does not accelerate, as gravity pushes the ball into the ramp and not along the surface of the ramp.

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Answer:

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3 years ago

A large piece of jewelry has a mass of 130.8 g. A graduated cylinder initially contains 47.7 mL water. When the jewelry is subme

Shkiper50 [21]

Answer: The density of this piece of jewelry is $8.90g/cm^3$

Explanation:

To calculate the density, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

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3 years ago

A textbook on a desk is experiencing a force of gravity of 1.56 Newtons.

disa [49]

Answer:

m= 0.162kg

Explanation:

a) You would draw a square to represent the textbook, and draw the forces that are acting on it, which is force of gravity (Fg going down), and the normal force (Fn, going up)

b) To find its mass, you would use the equation Fg = mg, where m is mass in kg, and g is acceleration of gravity due to earth (9.8m/s^2), and Fg is force of gravity. We know what g is, and we know Fg (1.56 N), so just plug into the eqn and solve for m:

Fg = mg

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3 years ago

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stich3 [128]

Answer:

Temperature, density

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Physical properties of a substance are those properties that do not change the chemical composition of the substance. There are two types of physical properties namely: intensive property and extensive property.

Intensive properties are those physical properties that does not depend on the sample size of the substance involved. Examples of intensive physical properties are temperature, density, boiling point. For example, the size or amount of a substance does not determine the the TEMPERATURE or BOILING POINT of the substance.

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