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2 years ago

8

1. Explain who is doing more work and why: a bricklayer carrying bricks and placing them on the wallof a building being

1 answer:

Basile [38]2 years ago

7 0

Both are doing because they have chorus

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3 years ago

Hi, so i have to find T1, can some1 help?

iragen [17]

30.1 N

Explanation:

Given:

$W_1 = 16\:\text{N}$

$W_2 = 8\:\text{N}$

Let's write the components of the net forces at the intersections. Note that the system is equilibrium so all the net forces are zero.

<u>Forces</u><u> </u><u>involving</u><u> </u><u>W1</u><u>:</u>

$x:\:\:\:-T_1 + T_3\cos \alpha = 0\:\: \\ \text{or}\:\:T_2 = T_3\cos \alpha\:\:\:\:\:(1)$

$y:\:\:\:T_3\sin \alpha - W_1 = 0\:\:\: \\ \text{or}\:\:\:T_3\sin \alpha = W_1\:\:\:\:\:\:(2)$

<u>Forces</u><u> </u><u>involving</u><u> </u><u>W2</u><u>:</u>

$x:\:\:\:T_1\sin 53 - T_3\sin \alpha = W_2\:\:\:\:\:\:\:(3)$

$y:\:\:\:T_4 - T_1\cos 53 - T_3\cos \alpha = 0\:\:\:\;(4)$

Substitute (2) into (3) and we get

$T_1\sin 53 - W_1 = W_2$

Solving for $T_1$ ,

$T_1 = \dfrac{W_1 + W_2}{\sin 53} = 30.1\:\text{N}$

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3 years ago

Problem 5 please! I need an equation to solve

Maru [420]

N(t) = N(0) x [1/2]^(t/th)
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N(0) = 100
t = 10
th = half life ... your answer

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3 years ago

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