1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
soldi70 [24.7K]
3 years ago
8

How do i calculate this?

Physics
1 answer:
Lesechka [4]3 years ago
8 0

CAR 1

Momentum = Mass/Velocity

M = 2100/20

M = 105 m/s^2

CAR 2

Momentum = Mass/Velocity

M = 2100/30

M = 70 m/s^2

You might be interested in
.A cart rolling down an incline for 5.0 seconds has an acceleration of 1.6 m/s2. If the cart has a beginning speed of 2.0 m/s, a
Ilia_Sergeevich [38]

Use the formula,

\Delta x=v_it+\dfrac12at^2

where \Delta x is the cart's displacement (from the origin), v_i is its initial speed, a is its acceleration, and t is time.

\Delta x=\left(2.0\dfrac{\rm m}{\rm s}\right)(5.0\,\mathrm s)+\dfrac12\left(1.6\dfrac{\rm m}{\mathrm s^2}\right)(5.0\,\mathrm s)^2

\implies\boxed{\Delta x=30\,\mathrm m}

Alternatively, since acceleration is constant, we have

\dfrac{v_f+v_i}2=\dfrac{\Delta x}t

That is, we have these two equivalent expressions for average velocity, where v_f is the cart's final velocity. Solve for \Delta x:

\dfrac{10\frac{\rm m}{\rm s}+2.0\frac{\rm m}{\rm s}}2=\dfrac{\Delta x}{5.0\,\mathrm s}

\implies\boxed{\Delta x=30\,\mathrm m}

8 0
3 years ago
A gas within a piston–cylinder assembly undergoes a
IrinaVladis [17]

Answer:

W_{net}= -280.5 kJ

Q_{23}= 80.0 kJ

Explanation:

The net work of the cycle is the sum of works in each process.

<u>For the first process 1-2: </u> Let's apply the work definition.

W=\int pdV (1)

Now, we need the pressure. We know that pV=C, where C is a constant. Then  p_{1}V_{1}=10^{5}2=2*10^{5} [J]

So p=\frac{2*10^{5}}{V}

Let's put p in (1):

W_{12}=\int \frac{2*10^{5}}{V}dV=2*10^{5}\int \frac{1}{V}dV

W_{12}=2*10^{5}(ln(V_{2})-ln(V_{1}))=2*10^{5}(ln(0.2)-ln(2))=-460.5 kJ

Using the first law of thermodynamics we can find Q.

Q_{12}-W=\Delta U

Q_{12}=W+\Delta U=-460.5 + 100= -360.5 kJ

<u>Second process 2-3</u>

In this case, we have a constant volume, so the work done here is 0.

W_{23}=0

<u>Third process 3-1</u>

W_{31}=\int pdV=p\int dV=p(V_{2}-V_{1})

W_{31}=10^{5}(2-0.2)=180 kJ

Finally, the net work is:

W_{net}=W_{12}+W_{23}+W_{31}= -280.5 kJ

By the conservation of energy:

(Q_{12}+Q_{23}+Q_{31})-(W_{net})=\Delta E=0

Because there is no change in total energy.

So:

Q_{23}=W_{net}-Q_{12}= 80.0 kJ

It is a refrigerator because the net work is negative, it means it consumes energy.

I hope it helps you!

3 0
3 years ago
An object that is in free fall seems to be ______
Tomtit [17]
<span>The answer would be weightless. The occurrence of "weightlessness" happens when there is no force of support on your body. When your body is efficiently in "free fall", quickening downward at the acceleration of gravity, then you are not being maintained.</span>
3 0
2 years ago
Answer with step by step​
Archy [21]
If 'C' and 'R' represent capacilance and resistance respectively then the dimensions of RC are:


A:M^0L^0T^2
B:M^0L^0T^1
C:Ml^1
D:Ml^-1T^2
E;None of these
7 0
3 years ago
(This is for other people with this Question i hope you find this when you need help) Need answer for this Help!!!
Radda [10]

Answer:

0.48N

Explanation:

according to the second law of motion

force=mass×acceleration

the mass in this question is 0.025,the acceleration 19

therefore f=0.025×19

=0.48N

I hope this helps

7 0
2 years ago
Other questions:
  • Im done with this XD im giving away my points XD<br><br> what comes up must go down who said that?
    15·2 answers
  • What happens when visible light strikes a surface?
    13·1 answer
  • An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object?
    10·2 answers
  • A uniform magnetic field of magnitude 0.23 T is directed perpendicular to the plane of a rectangular loop having dimensions 7.8
    12·2 answers
  • When tension is applied to a metal wire of length L , it stretches by Δ L . If the same tension is applied to a metal wire of th
    11·2 answers
  • What kind of gas cloud is most likely to give birth to stars? what kind of gas cloud is most likely to give birth to stars? a co
    13·1 answer
  • Please may you answer this.
    9·1 answer
  • In any electromagnetic wave,
    13·1 answer
  • How do i do this is hard
    11·1 answer
  • What is the largest continent
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!