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3 years ago

Newton's Three laws talk about all of the following:

1 answer:

6 0

Force, because all three laws talk about how an object needs to be acted upon to move (an object in motion will stay in motion, an object at rest will stay at rest, every action has an equal opposite reaction)

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In the case of a swinging pendulum, Potential Energy is greatest when ____.

GREYUIT [131]

I am almost 100% positive the answer is A.

4 0

3 years ago

Read 2 more answers

Two arrows are fired horizontally with the same speed of

Fed [463]

Answer:

Explanation:

Given

mass of each arrow=0.1 kg

velocity of arrow=30 m/s

One arrow is fired u=due to east and another towards south

Momentum of first arrow

$P_1=0.1\left ( 30\hat{i}\right )=3\hat{i}$

$P_2=0.1\left ( -30\hat{j}\right )=-3\hat{j}$

Total momentum P

$P=P_1+P_2$

$P=3\hat{i}-3\hat{j}$

magnitude $|P|=\sqrt{3^2+3^2}=3\sqrt{2}$

direction

$tan\theta =\frac{-3}{3}$

$\theta =45^{\circ}$ clockwise w.r.t to east

6 0

3 years ago

Determine the magnitude of the resultant force and its direction using both the parallelogram and Cartesian vector notation meth

Alika [10]

Answer:

F = 1494.52 N, θ = 44º

Explanation:

For the sum of vectors by the parallelogram method, see attached, the vectors are drawn, the parallelogram is completed and a vector is drawn from the origin of the two vectors to the end point of the rectangle, this is the resulting vector.

The attachment shows this roughly.

For the Cartesian coordinate method, each vector is decomposed into its components, they are added algebraically and then the resulting vector is composed in the form of a module and angles

we use trigonometry to decompose the vectors.

The coordinate system can be seen in the attachment

sin θ = y / R

cos θ = x / R

y = R sin θ

x = R cos θ

Vector 1

module F₁ and angle β₁ = 50

sin 50 = $\frac{F_{1y} }{F_1}$

cos 50 = $\frac{F_{1x} }{F_1}$

$F_{1y}$ = F₁ sin 50

F₁ₓ = F₁ cos 50

F_{1y} = 600 sin 50 = 459.63 N

F₁ₓ = 600 cos 50 = 385.67 N

Vector 2

modulus F₂ = 900N, angle β₂ = 40

F_{2y} = 900 sin 40 = 578.51 N

F₂ₓ = 900 cos 40 = 689.44 N

we find the resultant of each component

F_{y} =F_{1y} + F_{2y}

F_{y} = 459.63 + 578.51

F_{y} = 1038.14 N

Fₓ = F₁ₓ + F₂ₓ

Fₓ = 385.67 + 689.44

Fₓ = 1075.11 N

We use the Pythagorean theorem to find the modulus of the resultant

F = Fₓ² + $F_{y}^2$

F = √(1075.11² + 1038.14²)

F = 1494.52 N

we use trigonometry for the angle

tan θ = F_y / Fₓ

θ = tan⁻¹ (F_y / Fₓ)

θ = tan⁻¹ (1038.14 / 1075.11)

θ = 44º

8 0

3 years ago

Three tiny charged metal balls are arranged on a straight line. The middle ball is positively charged and the two outside balls

Dmitrij [34]

Answer:

$(a) 189.23 N$ , $(b) 47.31 N$ and $(c) 141.92 N$ .

Explanation:

Three balls are shown in figure having charge $q=1.45 \mu C$ . The middle ball, $B$ , is positively charged having charge $+q$ , and the remaining two outside balls, $A$ and $C$ , are negatively charged having charged $-q$ as shown.