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3 years ago

The resultant of two vectors acting at a 90°-angle can be determined from the _____ of the rectangle.

Physics

2 answers:

Mama L [17]3 years ago

6 0

Answer:

D.diagonal

Explanation:

To add two or more vectors, is to represent them by only one called resulting. This resulting vector produces the same effects as all together. Keep in mind that the vector sum is not the same as the arithmetic sum.

Parallelogram Method

This method is valid only for two coplanar and concurrent vectors, to find the resulting one joins the vectors by the origin (sliding them) and then form a parallelogram, the resulting vector will be in one of the diagonals, and its application point will coincide with the common origin of the two vectors.

In the case of 2 vectors that form a right angle, bone of 90 °, it is a special case and can be determined directly by the diagonal that crosses the rectangle.

quester [9]3 years ago

5 0

D. Diagonal....................?

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UNO [17]

Define
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Therefore,
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3 years ago

Object A of mass 0.70 kg travels horizontally on a frictionless surface at 20 m/s. It collides with object B, which is initially

AnnZ [28]

Answer:

25.71 kgm/s

Explanation:

Let K₁ and K₂ be the initial and final kinetic energies of object A and v₁ and v₂ its initial and final speeds.

Given that K₂ = 0.7K₁

1/2mv₂² = 0.7(1/2mv₁²)

v₂ = √0.7v₁ = √0.7 × 20 m/s = ±16.73 m/s

Since A rebounds, its velocity = -16.73 m/s and its momentum change, p₂ = mΔv = m(v₂ - v₁) = 0.7 kg (-16.73 - 20) m/s = 0.7( -36.73) = -25.71 kgm/s.

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3 years ago

________ in the ear change sound waves to electrical signals that the brain can interpret as sounds

Assoli18 [71]

Answer:

ear

Explanation:

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2 years ago

A soccer ball kicked with a force of 12.5 N accelerates at 6.2 m/s’ to the right. What is the mass of the ball? Answer in units

stepladder [879]

Answer:

m = 2.01[kg]

Explanation:

This problem can be solved using Newton's second law which tells us that the force applied on a body is equal to the product of mass by acceleration.

$F =m*a$

where:

F = force = 12.5 [N]

m = mass [kg]

a = acceleration = 6.2 [m/s²]

$12.5=m*6.2\\m = 2.01[kg]$

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3 years ago

When a second student joins the first, the height difference between the liquid levels in the right and left pistons is 40 cm .

vlada-n [284]

Answer:

m = 56.5 kg

Explanation:

Since the addition of mass on one piston caused a change in pressure head at the other. Diameter of the piston calculated is used as 0.46 m

Δm*g / Area = p * g * Δh ..... Eq1

$m = \frac{p*h*A}{g}$

$m = \frac{850 * 0.4 * pi*0.46^2}{4*9.81}\\\\m= 56.5 kg$

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3 years ago