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4 years ago

Hello, I'm not sure how to solve for a using the Kinematic equation "Don't need Vf". Can anybody help? Heres the problem:

1 answer:

4 0

There are varieties of kinematic equations that so long as you have 3 known variables, you can find a 4th unknown.

vi = 2.2m/s

d = 17.5m

t = 5.5s

a = ?

As can be seen here, you have 3 out of the 4 variables. So the kinematic equation which relates these variables is:

x = vi*t + (1/2)at^2

(17.5) = (2.2)(5.5) + (1/2)a(5.5)^2 Plug in your knowns

17.5 = 12.1 + 15.1a Combine values

5.4 = 15.1a Isolate a

0.36 m/s^2 = a

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9. 2076 Set B Q.No. 9b Two galvanometers, which are otherwise identical; are fitted with different coils. One has coil of 50 tur

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The ratio of the deflection when each is connected in turns to a cell of e.m.f 25 V and internal resistance 50 ohms is 13: 12

<h3></h3><h3>What is internal resistance?</h3>

Internal resistance can be described as the resistance within a battery, or other voltage source, that causes a drop in the source voltage when there is a current.

The parameters given are :

Coil 1 = 50 turns

Coil 2 = 500 turns

Resistance 1 = 1022

Resistance 2 = 6002

Internal resistance = 50 ohms

Emf = 25v

I = 25/ 50+ 10

I = 25/60

I = 5/ 12 A

$I_{2}$ = 25/50+ 600

= 25/ 650

= 5/ 130 A

The ratio of the deflection when each is connected in turns to a cell of e.m. 25 V and internal resistance 50 ohms =

Q1/ Q2

Q1 = N1 x B x $I_{1}$ / c

Q2 = N2 x B x $I_{2}$ / c

therefore Q/ Q2 = (50 x 5/12 )/ (500 x 5/130)

Q1 / Q2 = 12/ 13 which 13: 12

Therefore, The ratio of the deflection when each is connected in turns to a cell of e.m. 25 V and internal resistance 50 ohms is 13: 12.

Learn more about internal resistance at; brainly.com/question/20595977

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