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3 years ago

If the slope of a position vs. time graph is negative, what does that imply about the motion of an object?

1 answer:

4 0

So the slope of a position graph has to equal the velocity. This is also true for a position graph where the slope is changing. ... This means that the velocity is negative and the object is moving in the negative direction

hope it helps you

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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

The electric field strength in the space between two closely spaced parallel disks is 1.0 105 N/C. This field is the result of t

balu736 [363]

Answer:

$D=2.996\times 10^{-2} m$

Explanation:

*Assume the parallel disks have equal diameters.

Given the electric strength as $1.0\times 10^5 N/C.$ transferring $3.9\times 10^9$ electrons, the disk's Area can be calculated using the formula:

$E=\frac{\eta}{\epsilon_o}=\frac{Q}{A\epsilon_o}\\\\A=\frac{Q}{E\epsilon_o}\\\\=\frac{(3.9\times 10^9)\times (1.6\times10^{-19})}{(1.0\times 10^5 )\times (8.85\times10^{-12})}\\\\A=7.0508\times 10^{-4} \ m^2$

#We now calculate the disks diameter:

$A=\pi(D/2)^2\\\\2\sqrt{\frac{A}{\pi}}=D\\\\=2\sqrt{7.0508\times 10^{-4}/\pi}\\\\D=2.996\times 10^{-2} \ m$

Hence, the diameter of the disks is $D=2.996\times 10^{-2} m$

8 0

4 years ago

Why sheets of newspaper can be used to keep ice cream cold and keep fish and chips hot?

stich3 [128]

Answer: Paper

Explanation: It is a insulator

7 0

4 years ago

Does spearmint gum have alcohol in it

Andreyy89

Yes it has sugar alcohol

3 0

3 years ago

Potential energy can be converted into kinetic energy, a good example of this is when a pole-vaulter bends the pole during a lea

lesantik [10]

Answer:

The pole stores elastic potential energy when the pole is bent because its shape is change from its natural shape and it will want to go back to its original form, just like a spring or stretched elastic material.

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Why did you lie about being in college?

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3 years ago

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