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3 years ago

magnitude of velocity does not change but the direction changes. Can we say that it is an accelerated motion?

Physics

1 answer:

Olenka [21]3 years ago

4 0

Answer:

MRCORRECT has answered the question

Explanation:

Since velocity is a vector, it can change either in magnitude or in direction. Acceleration is therefore a change in either speed ordirection, or both. Keep in mind that althoughacceleration is in the direction of the changein velocity, it is not always in the direction ofmotion.

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Two concentric current loops lie in the same plane. The smaller loop has a radius of 3.8 cm and a current of 12 A . The bigger l

Stolb23 [73]

Answer:

$R_2=6.33cm$

Explanation:

The equation for the magnetic field at the center of a circular loop is:

$B=\frac{\mu_0I}{2R}$

If we name the smaller loop as 1 and the bigger loop as 2 and we impose the same magnitude of the magnetic field at their center, we have:

$B_2=B_1$

$\frac{\mu_0I_2}{2R_2}=\frac{\mu_0I_1}{2R_1}$

$\frac{I_2}{R_2}=\frac{I_1}{R_1}$

$R_2=\frac{I_2}{I_1}R_1$

Which for our values means:

$R_2=\frac{I_2}{I_1}R_1=\frac{(20A)}{(12A)}(3.8cm)=6.33cm$

(Notice that we don't need to convert cm to m, we get our result in cm).

3 0

3 years ago

A 72 kg sled Is pulled forward from rest by a snowmobile and accelerates at 2 m/s squared forward for five seconds. The force of

Inga [223]

So first make a force diagram. I would label forward forces + and backward forces -. Essentially, the drag force is equal to the Ft (force of tension) + Ff (force of friction on snowmobile - driver system). The force of Friction is equal to mu * Fn. We can find mu through the force of friction acting on the sled. 120 N = mu * Fn (equal to m * g of sled). mu of the Ice is equal to 0.167. So, 540 N = Ft + 0.167 * 4500 N. Ft = -211.5 N. <u>Ft is acting in the backwards direction at a magnitude of 211.5 N</u>

3 0

4 years ago

Is work being done if you push a child in a wagon

Leto [7]

yes. youre using energy to make the wagon with the child in the wagon

6 0

4 years ago

Read 2 more answers

A rectangular flat coil moves at constant speed through a uniform magnetic field. The direction of the field is into the plane o

alukav5142 [94]

Answer:

The induced current will flow in a direction north of the plane of the paper

Explanation:

This is in compliance with faraday's right hand rule pictured below.

3 0

3 years ago

What is the unit to measure force?

melomori [17]

Answer: Newton

Explanation:

Force is measured in Newtons, which are units that equal 1 kg * m/sec2. You can calculate the amount of force that an object experiences with the equation force = mass * acceleration

5 0

3 years ago