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Lelechka [254]
2 years ago
13

When placed at a certain point, a

Physics
1 answer:
Wewaii [24]2 years ago
6 0

Answer: 180

Explanation: Acellus

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Objects A and B, of mass M and 2M respectively, are each pushed a distance d straight up an inclined plane by a force F parallel
krek1111 [17]

Answer:

The correct answer is <u>option (A) that is KEA > KEB .</u>

Explanation:

Let us calculate -

If the object is straighten up and inclined plane , the work done is

W=F_d- F_f_r_id-F_gh

W=F_d-\mu_kmgdcos\theta-mgdsin\theta

The change in kinetic energy is ,

   \Delta K=\frac{1}{2}mv^2-\frac{1}{2}m\nu_0^2

At the top of the inclined plane , the velocity is zero

So,

\Delta K=\frac{1}{2} m(0)^2-\frac{1}{2}m\nu_0^2

\Delta KE=-\frac{1}{2}m\nu_0^2

From the work energy theorem , we have W=-\Delta K in case of friction , so

\frac{1}{2}m\nu_0^2=Fd-\mu_kmgdcos\theta-mgdsin\theta

KE=Fd-\mu_kmgdcos\theta-mgdsin\theta

For object A-

KE_A=Fd-\mu_kmgdcos\theta-mgdsin\theta

For object B

KE_B= Fd -2\mu_kMgdcos\theta-2Mgdsin\theta

KE_B= Fd -2(\mu_kMgdcos\theta-Mgdsin\theta)

Thus , larger mass is going to mean less total work and a lower kinetic energy .

From the above results , we get

KE_A >KE_B

<u>Therefore , option A is correct .</u>

6 0
2 years ago
PLEASE ANSWER THIS QUICK
Alekssandra [29.7K]

Answer:

I think it's a chemical change.

4 0
2 years ago
A machine produces a larger force than you exert to operate the machine. How does this input distance of the machine compare to
arlik [135]

Answer:

Because the output force is greater than the input force, the input distance must be greater than the output distance.

Explanation:

7 0
3 years ago
A torque of 50 N*m acts on a wheel of moment of inertia 25 kg*m^2 for 4 s and then is removed.
motikmotik
You have to find the calculate<span> the circumference first then you can just multiply the diameter by π, which is about 3.142. That gives you the distance for each </span>revolution<span>. Then you can multiply by the </span>number of revolutions<span> per minute.

</span>
3 0
3 years ago
Which of the following are homogeneous solutions?
lana [24]

Answer:

salt water, air and vinegar are homogeneous solutions.

Explanation:

A solution which consists of particles of same proportion is known as a homogeneous solution. Whereas a solution which consists of particles of different proportion is known as a heterogeneous solution.

Salt and water are homogeneous solutions as salt completely disperses in water and forms a clear solution as the particles of salt and water are in proportion.

Air is composed of different gases like nitrogen, oxygen etc are all mixed in fixed ratio. Therefore, air is a homogeneous mixture.

Sand and water are heterogeneous solution as the ration of mixing is different and more over sand particles can be separated from water. Thus, it is not a homogeneous mixture.

Vinegar is also a homogeneous solution as it is composed of acetic acid and water which are mixed in fixed proportion.

Cement is a heterogeneous mixture as it is composed of a number of different substances mixed in different proportions.

Thus, we can conclude that salt water, air and vinegar are homogeneous solutions.

7 0
3 years ago
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