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il63 [147K]
3 years ago
6

A rectangular plate is supported by three cables as shown. knowing that the tension in cable ab is 408 n, determine the componen

ts of the force exerted on the plate at
b.

Physics
1 answer:
Sholpan [36]3 years ago
4 0

Answer:

  (192i +288j -216k) N

Explanation:

The un-normalized vector BA is ...

  320i +480j -360k

Then the normalized vector is ...

  (8i +12j -9k)/√(8² +12² +(-9)²) = (8/17)i +(12/17)j -(9/17)k

The cable tension multiplies this to give the components of cable tension:

  (408 N)((8/17)i +(12/17)j -(9/17)k) = (192i +288j -216k) N

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anastassius [24]

Answer:

v_{f}=-6.2 m/s

Explanation:

The ball will rise decreasing its speed until it reaches the highest point where its speed will be zero. From this point the tennis ball will begin to fall again, in the free fall the tennis ball will gain speed but now in the opposite direction. When it returns to the same point where it was launched, its speed will be the same as the one that was launched but with the opposite sign.

v_{f}=-6.2 m/s

We can check this using the equation:

v_{f}^2=v_{i}^2+2gh

where v_{i}=+6.2 m/s

ang h is the height, but because the ball returns to the same point where it started, h =0

then

v_{f}^2=v_{i}^2

v_{f}=v_{i}

the initial and final velocity will be the same in number, but we know that the ball is going in the opposite direction, so the final velocity must have the opposite sign from the initial velocity

so if v_{i}=+6.2 m/s,

v_{f}=-6.2 m/s

4 0
3 years ago
A positive charge (q = +6.0 µC) starts from point A in a constant electric field and accelerates to point B. The work done by th
riadik2000 [5.3K]

Vb - Va = -366.7 V.

Vab = Va - Vb, the potential of a with respect to b, is equal to the work done by the electric force when a unit of charge moves from a to b, it is given by:

Vab = Va - Vb = Wab/q,

So, in order to determinate the potential difference Vb - Va we have to multiply by -1 both side of the equation above:

- (Va - Vb) = - (Wab/q)

Resulting

Vb - Va = -(Wab/q)

Given a positive charge q = 6.0μC = 6.0x10⁻⁶C, Wab = 2.2x10⁻³J. Determine Vb - Va.

Vb - Va = - (2.2x10⁻³J/6.0x10⁻⁶C)

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LenaWriter [7]

Answer:

16,139.7 m3

Explanation:

you divide 633,019 ÷ 191,714 to get 3.302 to find out how much greater the pa was from the first tire. then you multiply 3.302 × 4,888 m3 to get how much greater the volume is, which is also the answer.

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klio [65]
Answer:
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