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erik [133]
3 years ago
8

A ping pong ball has a mass of about 2.45 grams. Suppose that Forrest Gump hits the ball across the table with a speed of about

4.00 m/s. What is the ball’s KE?
Physics
1 answer:
KonstantinChe [14]3 years ago
4 0

Answer:

0.0196 Joules

Explanation:

Kinetic energy is half the product of mass and velocity squared.

K.E=0.5 m*v^2; The m is the mass in kilograms and v is the velocity in meters per second.

We will convert grams to kilograms:

2.45 grams = 0.00245 kilograms.

Calculating kinetic energy:

mass:0.00245 kg

velocity:4 m/s

K.E = 0.5 *0.00245*4^2 = 0.0196 Joules.

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Answer:

F = 236063.6N

Explanation:

Please see attachment below.

4 0
3 years ago
The projectile launcher shown below will give the object on the right an initial horizontal speed of 5.9 m/s. While the other ob
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Answer:

104.3 cm  or 179.7

Explanation:

First find time that it takes for the object to hit the ground

\sqrt{(2H)/g}  ->   \sqrt{(2 x 179)/ 9.8} = 6.04s\\*

Then find xf of projectile xf= 5.9(6.04) = 37.7\\\\

not 100% sure if the projectile is going away from the object or towards it but you either do 142- 37.7   or    142+37.7  

hope that helps

4 0
3 years ago
The International Space Station has a mass of 1.8 × 105 kg. A 70.0-kg astronaut inside the station pushes off one wall of the st
Aleonysh [2.5K]

Answer:

a = 5.83 \times 10^{-4} m/s^2

Explanation:

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so here we can say that net force on the system is zero here

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so here we know that

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F = ma

F = 70(1.50) = 105 N

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F = ma

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a = \frac{105}{1.8 \times 10^5}

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3 0
3 years ago
Which best describes a nonmagnetic material?
Natali [406]
Material that is not attracted to metal

3 0
3 years ago
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What is the wavelength of a wave that has a speed of 160 m/s and a period of 3.7 ms?
Elza [17]

Answer:

160m/s

Explanation:

The speed of a wave is related to its frequency and wavelength, according to this equation:

v=f ×λ

3 0
2 years ago
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