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2 years ago

If you want to calculate the acceleration of a car, you should _____ the change in velocity of the car by the time interval.

Physics

2 answers:

Irina-Kira [14]2 years ago

6 0

Answer:

divide

Explanation:

u should divide the velocity by time interval because a=vf-vi/t

Neporo4naja [7]2 years ago

5 0

Answer:

Your awnser is B. Increase

Explanation:

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The acceleration of a particle moving along a straight line is given by a = −kt2 m/s2 where k is a constant and time t is in sec

RSB [31]

Answer:

$X - Xo = 54m$

k = 1/18

Explanation:

Data:

a = -k $t^{2}$ $\frac{m}{s^{2} }$

to = 0s Vo = 12m/s

t = 6s the particle chage it's moviment, so v = 0 m/s

We know that acceleration is the derivative of velocity related to time:

$a = \frac{dV}{dT}$

rearranging...

$a*dT = dV$

Then, we must integrate both sides:

$\int\limits^f_i {dV} \, dV =-k \int\limits^f_i {t^{2} } \, dT$

$V - Vo = -k\frac{t^{3} }{3}$

V = 0 because the exercise says that the car change it's direction:

$0 - 12 = -k\frac{6^{3} }{3}$

k = 1/6

In order to find X - Xo we must integer v*dT = dX

$V - Vo = -k\frac{t^{3} }{3}$

so...

$(Vo -k\frac{t^{3} }{3})dT = dX$

$\int\limits^f_i {dX} \, dX = \int\limits^f_i {Vo -k\frac{t^{3} }{3} } \, dT$

integrating...

$X - Xo = Vot -k\frac{t^{4} }{12}$

$X - Xo = 12*6 -\frac{1}{6}* \frac{6^{4} }{12}$

X - Xo = 54m

5 0

3 years ago

The velocity of in water is 1500 m/s.

victus00 [196]

1500 m

<u>Explanation:</u>

Step 1:

From the basics of Sound Physics,

Distance = (Speed * Time) / 2

Here Speed = 1500 m/s

Time = 2 Seconds

Step 2:

Distance = ( 1500 * 2)/2

= 1500 m

7 0

3 years ago

A bowling ball has a mass of 6 kg. What happens to its momentum when its speed increases from 2 m/s to 4 m/s?

mash [69]

Answer:

B) The initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s

Explanation:

The momentum of an object is given by the product between its mass (m) and its velocity (v):

$p=mv$

Let's apply this formula to calculate the initial momentum and final momentum of the ball:

- initial momentum:

$p_i = m v_i = (6 kg)(2 m/s)=12 kg m/s$

- Final momentum:

$p_f = m v_f = (6 kg)(4 m/s)=24 kg m/s$

So, the correct answer is

B) The initial momentum is 12 kg*m/s, and the final momentum is 24 kg*m/s

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3 years ago

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A lack of precision in scientific measurement typically arises from?

PtichkaEL [24]

Answer:

limitations of the measuring instrument.

Explanation:

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2 years ago

A good thermal conductor

Marta_Voda [28]

Answer:

copper and aluminum have the highest thermal conductivity while steel and bronze have the lowest. Heat conductivity is a very important property when deciding which metal to use for a specific application.

Explanation:

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2 years ago

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