Ask question

Ask question

All categories

4 years ago

10

When an object is moving at negative acceleration, does that mean it is moving backwards?

1 answer:

Alisiya [41]4 years ago

5 0

Not necessarily, it will move backwards when velocity goes into negative.

You might be interested in

Any two importance of measurement in points (i am giving you 30 points)

erma4kov [3.2K]

Answer:

1.It helps in trade and business.

2. It helps to perform scientific calculations.

5 0

3 years ago

Water is flowing into a factory in a horizontal pipe with a radius of 0.0183 m at ground level. This pipe is then connected to a

timama [110]

Answer:

$0.0168 m^3/s$

Explanation:

We are given that

$r_1=0.0183 m$

$h_1=0$

$r_2=0.0420 m$

$h_2=12.6 m$

Let $P_1=P_2=P$

By using Bernoulli theorem

$P+\frac{1}{2}\rho v^2_1+\rho gh_1=P+\frac{1}{2}\rho v^2_2+\rho gh_2$

$\frac{1}{2}\rho v^2_1+\rho gh_1=\frac{1}{2}\rho v^2_2+\rho gh_2$

$v^2_1+2gh_1=v^2_2+2gh_2$

$A_1v_1=A_2v_2$

$v_1=\frac{A_2v_2}{A_1}$

$(\frac{A_2}{A_1})^2v^2_2+2g\times 0=v^2_2+2\times 9.8\times 12.6$

$(\frac{\pi r^2_2}{\pi r^2_1})^2v^2_2-v^2_2=246.96$

$v^2_2((\frac{r^2_2}{r^2_1})^2-1)=246.96$

$v^2_2=246.96\frac{r^4_1}{r^2_4-r^4_1}$

$v_2=\sqrt{246.96\frac{r^4_1}{r^4_2-r^4_1}}$

$v_2=\sqrt{246.96\times \frac{(0.0183)^4}{(0.042)^4-(0.0183)^4}}$

$v_2=3.038 m/s$

Volume flow rate = $A_2v_2$

Volume flow rate = $\pi r^2_2v_2=\pi (0.042)^2\times 3.038=0.0168 m^3/s$

3 0

3 years ago

laila [671]

Answer:

pressure is applied to the ground

by a 79 kg man who is standing on square

stilts that measure 0.04 m on each edge?

Answer in units of Pa.

t 2

7 0

3 years ago

Two insects are at points 1 and 2. which

Ilia_Sergeevich [38]

The second one because it has a longer way that the rotation has to go around. the first one will just be quicker. it depends how the question wants you to describe kinetic energy! if it wants quicker, then 1. if longer movement, then 2!

6 0

3 years ago

Which quantity is expressed in units of watts (W)?

erastovalidia [21]

The quantity that is expressed in Watts (W) is power. It is an SI unit, and can be obtained by multiplying voltage and current, or the square of voltage divided by the resistance, or the square of the current multiplied by the resistance.

4 0

3 years ago

Read 2 more answers