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Aleksandr-060686 [28]
3 years ago
10

Ok, so I've answered this question but I really need someone to just check through it because I have this feeling that I've done

it wron

Physics
2 answers:
bonufazy [111]3 years ago
5 0
Your fill-ins for the first three lines of the table are correct.  Good work.

You have all the same answers for the last 2 lines of the table, like
it makes no difference to anything whether S2 is open or closed. 
That's not correct. It does make a difference.  If S2 is closed, then
the current would much rather go through S2 than through the bulbs
C and D because it's so much easier, and that's exactly what it does.
When S2 is closed, bulbs C and D are off. 

But I'll say again:  Except for those two middle boxes on the bottom line
of the table, everything else is correct.  That's 12 correct fill-ins for you,
and only 2 incorrect ones.  That's a score of 86% !  After posting so many
of these on Brainly this afternoon, doesn't it feel great to do your own work
for a change, and get it almost all correct ?
olga_2 [115]3 years ago
4 0
I believe you are correct
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To practice Problem-Solving Strategy 11.1 Equilibrium of a Rigid Body. A horizontal uniform bar of mass 2.7 kg and length 3.0 m
Zanzabum

Answer:

T_{1} = 14.88 N

Explanation:

Let's begin by listing out the given variables:

M = 2.7 kg, L = 3 m, m = 1.35 kg, d = 0.6 m,

g = 9.8 m/s²

At equilibrium, the sum of all external torque acting on an object equals zero

τ(net) = 0

Taking moment about T_{1} we have:

(M + m) g * 0.5L - T_{2}(L - d) = 0

⇒ T_{2} = [(M + m) g * 0.5L] ÷ (L - d)

T_{2} = [(2.7 + 1.35) * 9.8 * 0.5(3)] ÷ (3 - 0.6)

T_{2}= 59.535 ÷ 2.4

T_{2} = 24.80625 N ≈ 24.81 N

Weight of bar(W) = M * g = 2.7 * 9.8 = 26.46 N

Weight of monkey(w) = m * g = 1.35 * 9.8 = 13.23 N

Using sum of equilibrium in the vertical direction, we have:

T_{1} + T_{2} = W + w   ------- Eqn 1

Substituting T2, W & w into the Eqn 1

T_{1} + 24.81 = 26.46 + 13.23

T_{1} = <u>14.88</u> N

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7.) What is the relationship between kinetic and potential energy?
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We know that potential energy is the energy that is stored within an object while kinetic energy is the energy that is in motion. The connection between the two is that potential energy transforms into kinetic energy
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