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2 years ago

Based on the Law of Conservation of Energy, which of the below is true?(1 point)

Physics

1 answer:

Veseljchak [2.6K]2 years ago

8 0

Answer:

Explanation:

why because if something is conserved, it is constant, and does not change with time. A moving body may change its position, acceleration, and velocity with time, but it's energy is constant. The conversation of energy law states that: In any closed system (isolated system) the total energy of the system remain constant.

Mathematically it is written as

$pe + ke = pe + ke$

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If a car is taveling with a speed 6 and comes to a curve in a flat road with radius ???? 13.5 m, what is the minumum value the c

Lemur [1.5K]

Answer:

$\mu_s \geq 0.27$

Explanation:

The centripetal force acting on the car must be equal to mv²/R, where m is the mass of the car, v its speed and R the radius of the curve. Since the only force acting on the car that is in the direction of the center of the circle is the frictional force, we have by the Newton's Second Law:

$f_s=\frac{mv^{2}}{R}$

But we know that:

$f_s\leq \mu_s N$

And the normal force is given by the sum of the forces in the vertical direction:

$N-mg=0 \implies N=mg$

Finally, we have:

$f_s=\frac{mv^{2}}{R} \leq \mu_s mg\\\\\implies \mu_s\geq \frac{v^{2}}{gR} \\\\\mu_s\geq \frac{(6\frac{m}{s}) ^{2}}{(9.8\frac{m}{s^{2}})(13.5m) }\\\\\mu_s\geq0.27$

So, the minimum value for the coefficient of friction is 0.27.

4 0

3 years ago

The planets that orbit the sun are large enough that their gravity produces a<br> ________ shape.

marishachu [46]

Answer:

a round shape. It has its own gravity to pull itself into a round shape

6 0

3 years ago

Which of the following is a chemical property of a mineral?

zzz [600]

Hardness, color , and luster.

But since you can pick one, I would say hardness

6 0

3 years ago

Read 2 more answers

An easy 20 points + brainiest.

Papessa [141]

Answer:

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune, Milky Way ;-;

4 0

2 years ago

How much work does ben do on his suitcase during the entire motion?

erastovalidia [21]

w = 200N

y = 10m

Fx = 50N

vx = 0.5m/s

dx = 35m

Work= Force x distance

vertical work

W = 200N x 10m = 2000J

Horizontal work

W= 50N x 35m = 1750 J

2000J + 1750J = 3750J

4 0

2 years ago