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poizon [28]
3 years ago
15

A 2kg object initially going 4m/s to the right is later going 8m/s. whats the change in velocity?

Physics
1 answer:
Nezavi [6.7K]3 years ago
6 0

The change in velocity is +4 m/s to the right (or -4 m/s to the left).

The object's mass is irrelevant.

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How much energy is required to accelerate a golf ball of mass 0.046 kg initially at rest to a speed of 0.75c?
Andrew [12]

The required energy to accelerate the golf ball is  0.232875X10^{16} kg-m/sec^2.

<h2>What is Energy?</h2>
  • Energy, which is observable in the execution of labor as well as in the form of light and heat, is the quantitative quality that is transmitted to an object or to a physical phenomenon in physics.
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Given that,

E=mc^2

=0.046X0.75^2Xc^2

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Learn more about energy here:

brainly.com/question/13881533

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3 0
1 year ago
Why is it advised to tie any luggage kept on the roof of a bus with a rope?​
hram777 [196]

Answer:

While the bus is moving, luggage tends to remain in inertia of motion state. When the bus stops, the luggage tends to resist the change and due to inertia of motion it moves forward and may fall off. That's why it is advised to tie any luggage kept on the roof of a bus with a rope.

7 0
2 years ago
Speakers A and B are vibrating in phase. They are directly facing each other, are 8.2 m apart, and are each playing a 78.0 Hz to
Stels [109]

Answer:6.298,4.1,1.9015

Explanation:

Wavelength=\frac{velocity of sound }{frequency}

=\frac{343}{78}=4.397 m

Distance of 3rd speaker from speaker A is x

From B 78-x

Difference between the distances must be a whole number of wavelengths

First

x-\left ( 8.2-x\right )=4.397    for 1 st wavelength

2x=8.2+4.397=12.597

x=6.298m

second

For zero wavelength

x-\left ( 8.2-x\right )=0

2x=8.2

x=4.1m

Third

\left ( 8.2-x\right )-x=4.397

x=1.9015 m

6 0
2 years ago
In a real system of levers, wheels, or pulleys, the AMA is less than the IMA because _____.
pickupchik [31]
In a real system of levers, wheels, or pulleys, the AMA is less than the IMA because of friction. 
AMA (Actual mechanical advantage) is found by dividing output force by effort force. The actual mechanical advantage will always be less than the ideal mechanical advantage. The ideal mechanical advantage assumes perfect efficiency which doesn't account for friction, while actual mechanical advantage does. Therefore; the IMA is always greater than the actual mechanical advantage because all machines must overcome friction. 
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3 years ago
Which of the following is not a means to accelerating?
GenaCL600 [577]
The answer is B. Remain still.
8 0
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