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3 years ago

And this one as well

Physics

1 answer:

Serggg [28]3 years ago

5 0

If I'm correct both of the answers are A.

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When the point of reference (the observer) is in motion, it flips the "rules" of vector addition (you ADD the vectors going in o

KengaRu [80]

Answer:

the statement is TRUE

Explanation:

When we move in the same direction, the relative speed of the two vehicles is lower, so we must subtract their speeds, if the result is positive the vehicles approach and if it is negative they move away.

v_relative = v₁ - v₂

When the two vehicles go in opposite directions, the speed is much higher, so we must add their speeds

v_relative = v₁ - (-v₂))

v_relative = v₁ + v₂

therefore the statement is TRUE

3 0

3 years ago

A 200 g hockey puck is launched up a metal ramp that is inclined at a 30° angle. The coefficients of static and kinetic friction

Vaselesa [24]

Answer:

H=1020.12m

Explanation:

From a balance of energy:

$\frac{m*Vo^2}{2} -mg*H=-Ff*d$ where H is the height it reached, d is the distance it traveled along the ramp and Ff = μk*N.

The relation between H and d is given by:

H = d*sin(30) Replace this into our previous equation:

$\frac{m*Vo^2}{2} -mg*d*sin(30)=-\mu_k*N*d$

From a sum of forces:

N -mg*cos(30) = 0 => N = mg*cos(30) Replacing this:

$\frac{m*Vo^2}{2} -mg*d*sin(30)=-\mu_k*mg*cos(30)*d$ Now we can solve for d:

d = 2040.23m

Thus H = 1020.12m

6 0

3 years ago

Read 2 more answers

What is the amount of charge when 13.5a is flowing for 2 1/2 hours

abruzzese [7]

Answer:

Quick Answer:

a. 8.9Ω

b. 1.2×104 C

Explanation:

4 0

3 years ago

Read 2 more answers

Rank the average gravitational forces from greatest to least between (a) the Sun and Mars, (b) the Sun and the Moon, and (c) the

Vera_Pavlovna [14]

Answer:

b,c,a.

Explanation:

We know that mass of sun > mass of Earth> mass of mars>mass of mars.

And Gravitation force F = $\frac{GmM}{r^2}$

G= gravitational constant

m= mass of lighter body

M= mass of heavier body.

r= distance between them.

Although the mass of earth is greater than that of moon , its distance from the sun is larger hence, gravitational force on moon by sun is greater than that on Earth.

Hence the correct order will be

b,c,a.

7 0

4 years ago

Place least complex to most complex:

Reika [66]

Cell, tissue, organ, organ sytem, organism, population, community, ecosystem, biome.

7 0

3 years ago