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4 years ago

5

A ball with a mass of 0.15 kg rolling at 2.7 m/s rolls down into a ditch that is 2.2 m deep. Assuming a complete transformation

of energy, what is the ball's velocity at the bottom of the ditch?

1 answer:

vlada-n [284]4 years ago

7 0

Answer:

6.57 m/s

Explanation:

gravitational potential energy= maximum kinetic energy

mgh= 1/2mv*2

(0.15)(9.8)(2.2)= 1/2(0.15)v*2

3.234= 1/2(0.15)v2

v2= 43.13

v=6.56 m/s

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According to Kepler, what do all bodies in orbit around another have in common?

dolphi86 [110]

D.
All follow an elliptical path that has two foci, rather than a circular path.

Kepler found paths are elliptical, not circular

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3 years ago

If State A is heated, which of the other two states would it more closely resemble? Explain.

Cloud [144]

Well if its a solid that your heating up then it would closely resemble a liquid and a gas. would be able to give a better answer if you provided more information

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3 years ago

Please answerASAP

Illusion [34]

Answer:

$8.9 m/s^2$

Explanation:

The period of a simple pendulum is given by the equation

$T=2\pi \sqrt{\frac{L}{g}}$

where

L is the lenght of the pendulum

g is the acceleration due to gravity at the location of the pendulum

We notice from the formula that the period of a pendulum does not depend on the mass of the system

In this problem:

-The pendulum comes back to the point of release exactly 2.4 seconds after the release. --> this means that the period of the pendulum is

T = 2.4 s

- The length of the pendulum is

L = 1.3 m

Re-arranging the equation for g, we can find the acceleration due to gravity on the planet:

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7 0

4 years ago

1) what is the potential energy at the end of the loop?

AlexFokin [52]

The potential energy at the end of the loop is equal to 0.3407 Joules.

<u>Given the following data:</u>

Mass of rock = 102.16 g to kg = 0.10216 kilogram.

Height of the loop = 34 cm to m = 0.34 meter.

Acceleration due to gravity = 9.8 $m/s^2$

<h3>What is potential energy?</h3>

Potential energy (P.E) refers to the energy that is possessed by an object due to its position (height) above planet Earth.

Mathematically, potential energy (P.E) is given by this formula;

$P.E = mgh$

<u>Where:</u>

m is the mass of an object.

g is the acceleration due to gravity.

h is the height of an object.

Substituting the given parameters into the formula, we have;

$P.E = 0.10216 \times 9.81 \times 0.34$

P.E = 0.3407 Joules.

<h3>What is kinetic energy?</h3>

Kinetic energy (K.E) refers to an energy that is possessed by a physical object due to its motion.

Mathematically, kinetic energy (K.E) is given by this formula;

$K.E = \frac{1}{2} MV^2$

<u>Note:</u> You'll have to calculate the velocity from the distance traveled by the car and photogate time in your experiment.

Based on the law of conservation of energy, we can deduce the following points:

Potential energy (P.E) is <u>highest</u> at the top of the loop while kinetic energy (K.E) is <u>lowest</u>.

Kinetic energy (K.E) is <u>highest</u> underneath the loop while potential energy (P.E) is <u>lowest</u>.

Read more on potential energy here: brainly.com/question/8664733

6 0

3 years ago

A sphere of radius 6cm is moulded into a thin cylindrical wire of length 32cm. Calculate the radius of the

suter [353]

Answer:

4/3 pi R^3 = pi r^2 L equating volume of sphere and wire

r = (4 R^3 / 3 * L)^1/2 solving for radius of wire

r = (4 * 6^3 / 3 * 32)^1/2

r = 9^1/2 cm = 3 cm = .03 meters

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2 years ago