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4 years ago

What is it called when velocity changes over time

Physics

2 answers:

Vedmedyk [2.9K]4 years ago

6 0

It's called Acceleration .

natka813 [3]4 years ago

3 0

Well,

When an object's velocity changes, we call it acceleration.

Acceleration: The time rate of change in an object's velocity

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You pull straight up on the string of a yo-yo with a force 0.24 N, and while your hand is moving up a distance 0.17 m, the yo-yo

Alex

Answer:

The transnational kinetic energy of the yo-yo is 0.083 J.

Explanation:

Given that,

Force=0.24 N

Distance in up= 0.17 m

Distance in down = 0.26 m

Mass of yo-yo = 0.057 kg

Initial speed = 2.4 m/s

Suppose we find the increase in the transnational kinetic energy of the yo-yo

The transnational kinetic energy is equal to the change in potential energy.

We need to calculate the transnational kinetic energy of the yo-yo

Using conservation of energy

$\Delta K.E=(mg-F)h$

Where, F = force

h = height

m = mass of yo-yo

Put the value into the formula

$\Delta K.E=(0.057\times9.8-0.24)\times0.26$

$\Delta K.E=0.083\ J$

Hence, The transnational kinetic energy of the yo-yo is 0.083 J.

3 0

3 years ago

A piano wire with mass 2.60g and length 84.0 cm is stretched with a tension of 25.0 N. A wave with frequency 120.0 Hz and amplit

likoan [24]

Answer:

Power will be 0.2023 watt

And when amplitude is halved then power will be 0.0505 watt

Explanation:

We have given mass of the Piano wire m = 2.60 gram = 0.0026 kg

Length of wire l = 84 cm = 0.84 m

So mass density $\mu =\frac{m}{l}=\frac{0.0026}{0.84}=0.0031kg/m$

Tension in the wire T = 25 N

Frequency f = 120 Hz

So angular frequency $\omega =2\pi f=2\times 3.14\times 120=753.6rad/sec$

And amplitude A = 1.6 mm = 0.0016 m

We have to find the generated power

Power is given by $P=\frac{1}{2}\sqrt{\mu T}\omega ^2A^2=\frac{1}{2}\times \sqrt{0.0031\times 25}\times 753.6^2\times 0.0016^2=0.2023watt$

From the relation we can see that power $P\ \propto\ A^2$

So if amplitude is halved then power will be $\frac{1}{4}$ times

So power will be equal to $\frac{0.2023}{2}=0.0505watt$

4 0

3 years ago

In which state of matter are the particles closest together?

vovikov84 [41]

Answer: The particles of a solid are [generally] closest together while those of a gas are farthest apart

Explanation:

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3 years ago

Use the data below to compute the gravitational force that the Sun exerts on Jupiter. (Use G = 6.67 x 10^-11 N · m²/kg².)

Mademuasel [1]

The gravitational force on two objects can be determined by the following equation:

$F=G\frac{m_{1}m_{2}}{r^2}$

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$F=6.67x10^{-11}\frac{(1.99x10^{30})(1.90x10^{27})}{(7.78x10^{11})^2}$

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F=4.17x10^23 N

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Jlenok [28]

Answer:

TRUE

Explanation:i've seen one and please make me the brainlest

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2 years ago