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3 years ago

V2 = v2. + 2 as, dimensional expression

Physics

2 answers:

laila [671]3 years ago

6 0

Answer:

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Monica [59]3 years ago

5 0

Answer:

This is the third equation of motion.

${ \rm{ {v}^{2} = {u}^{2} + 2as }}$

• Dimensions of velocity

${ \rm{velocity = \frac{distance}{time} }} \\ \\ { \rm{[velocity] = \frac{L}{T} }} \\ \\ { \rm{{[velocity] =LT {}^{ - 1} }}}$

• Dimensions of acceleration

${ \rm{[acceleration] = LT {}^{ - 2} }}$

Therefore, Answer is;

${ \rm{LT {}^{ - 1} = LT {}^{ - 1} + (2 \times LT {}^{ - 2} \times L) }} \\ \\ { \rm{LT {}^{ - 1} = 2LT {}^{ - 2}(T + L)}} \\ \\ { \boxed{ \rm{ \: \frac{T}{2} = L }}}$

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kati45 [8]

Answer:

0.12959085 J

Explanation:

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$U=k\dfrac{q^2}{d}$

In this system with three charges which are equidistant from each other

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3 years ago

An experimentalist fires a beam of electrons, creating a visible path in the air that can be measured. The beam is fired along a

gtnhenbr [62]

Answer:

Velocity of the electron in the beam.

Radius of the circulating electrons due to the magnetic field.

Explanation:

We have a Mathematical expression for the force on a moving charge in a magnetic field as:

$F=q.v.B.sin \theta$ ...........................(1)

where:

q= charge on the particle in coulomb

v= velocity of the charge projected into the magnetic field

B= intensity of the magnetic field in tesla

$\theta$ = angle between the velocity and direction of magnetic field

For the forces on rotating mass we have the formula:

$F=m.\frac{v^2}{r}$ ..........................................(2)

where:

m= mass of the charged particle

v= velocity of projection of charge into the magnetic field

r= radius of the path traced by the charge in the magnetic field

From eq. (1) and (2) we can calculate the magnetic field .

Now,

Using Ampere's Law we have:

$B = \frac{\mu_0 .I}{2 \pi r}$

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4 years ago

A roofer needs to get shingles onto a roof. Pulling the shingles up manually uses 1,549 N or force. The roofer decides to use a

joja [24]

Answer:

Mechanical advantage of pulleys = 3.47 (Approx)

Explanation:

Given:

Manual force = 1,549 N

Pulleys force = 446 N

Find:

Mechanical advantage of pulleys

Computation:

Mechanical advantage of pulleys = Manual force / Pulleys force

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Mechanical advantage of pulleys = 3.4730

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4 years ago

A ball is thrown upwards at 20m/s what is its displacement from its starting position at 7 seconds

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4 years ago

Consider two slides, both of the same height. One is long and the other is short. From which slide will a child have a greater f

Lunna [17]

Answer:

The final speed will be the same for the children on the shorter side and on the longer side.

Explanation:

This is because since the they are the same distance above the ground, their potential energy which is a function of mass, acceleration due to gravity and vertical height are the same.

PE = Mass × gravity × vertical height

At this point, we can deduce that the horizontal length of the slide has no effect on the potential energy. Only the vertical height does.

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mgh = $\frac{1}{2}$ m $v^{2}$

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It shows the final velocity is only a function f acceleration due to gravity and height.

Thus, making their velocities equal.

8 0

3 years ago

V2 = v2. + 2 as, dimensional expression​

V2 = v2. + 2 as, dimensional expression