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3 years ago

What is negative acceleration?

2 answers:

7 0

An object which moves in the positive direction has a positive velocity. If the object is slowing down then its acceleration vector is directed in the opposite direction as its motion in this case a negative acceleration.

Whitepunk [10]3 years ago

3 0

Answer:

Explanation:

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Question in picture, just want to confirm answer.<br> Is the answer B?

guapka [62]

Answer:

Explanation:

yep the answer is B

6 0

2 years ago

I WILL REPORT YOU IF YOU ANSWER WITH LINK!!! WILL GIVE BRAINLIEST

mars1129 [50]

Answer:

I think is is

Explanation:

B and C why because i have a gut feeling

8 0

3 years ago

A rod has a radius of 10 mm is subjected to an axial load of 15 N such that the axial strain in the rod is ????௫ = 2.75*10-6, de

EleoNora [17]

Answer:

Knowing we only have one load applied in just one direction we have to use the Hooke's law for one dimension

ex = бx/E

бx = Fx/A = Fx/π $r^{2}$

Using both equation and solving for the modulus of elasticity E

E = бx/ex = Fx / π $r^{2}$ ex

E = $\frac{15}{pi (10 * 10^{-3})^{2} * 2.75 * 10^{-6} } = 17.368 * 10^{9} Pa = 17.4 GPa$

Apply the Hooke's law for either y or z direction (circle will change in every direction) we can find the change in radius

ey = $\frac{1}{E}$ (бy - v (бx + бz)) = $-\frac{v}{E}$ бx

= $\frac{vFx}{Epir^{2} }$ = $\frac{0.23 * 15}{pi (10 * 10^{-3)^{2} } * 17.362 * 10^{9} } = -0.63 *10^{-6}$

Finally

ey = Δr / r

Δr = ey * r = 10 * $-0.63* 10^{-6} mm = -6.3 * 10^{-6} mm$

Δd = 2Δr = $-12.6 * 10^{-6} mm$

Explanation:

5 0

3 years ago

Does salt or fresh water make a difference in floating of ships? plz answer ASAP will give brainliest to the best answer

ch4aika [34]

Answer:

The density of salt water is more than that of density of fresh water, so so salt and fresh water makes a difference in floating of ships.

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3 years ago

Read 2 more answers

Please Awnser soon water's state of matters include stream, liquid water, and ice. what about water is the same in these states?

yulyashka [42]

Well the similarity is that even though they are in a different state of matter they still come from the same substance: h2o

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3 years ago