For an object to orbit another object

Which of the followijg is an example of kinetic energy

Ipatiy [6.2K]

Answer:

D

Explanation:

D. A swing moving back and forth

3 0

3 years ago

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The ball and socket joint in the hip is similar to the ball and socket joint of the shoulder but is designed more for __________

Viktor [21]

Answer:

a. power

b. precision

Explanation:

The hip is a spherical joint that allows the upper leg to move from front to back and from side to side. The largest joint that supports weight in the body, the hip joint is surrounded by strong ligaments and muscles.

It differs mainly with the circular articulation of the shoulder since it allows it to perform movement of greater power and with greater precision

8 0

3 years ago

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Calculate the speed of the ball, vo in m/s, just after the launch. A bowling ball of mass m = 1.5 kg is launched from a spring c

klemol [59]

Answer:

$v_0=17.3m/s$

Explanation:

In this problem we have three important moments; the instant in which the ball is released (1), the instant in which the ball starts to fly freely (2) and the instant in which has its maximum height (3). From the conservation of mechanical energy, the total energy in each moment has to be the same. In (1), it is only elastic potential energy; in (2) and (3) are both gravitational potential energy and kinetic energy. Writing this and substituting by known values, we obtain:

$E_1=E_2=E_3\\\\U_e_1=U_g_2+K_2=U_g_3+K_3\\\\\frac{1}{2}kd^2=mg(d\sin\theta)+\frac{1}{2}mv_0^2=mgh+\frac{1}{2}m(v_0\cos\theta)^2$

Since we only care about the velocity $v_0$ , we can keep only the second and third parts of the equation and solve:

$mgd\sin\theta+\frac{1}{2}mv_0^2=mgh+\frac{1}{2}mv_0^2\cos^2\theta\\\\\frac{1}{2}mv_0^2(1-\cos^2\theta)=mg(h-d\sin\theta)\\\\v_0=\sqrt{\frac{2g(h-d\sin\theta)}{1-\cos^2\theta}}\\\\v_0=\sqrt{\frac{2(9.8m/s^2)(4.4m-(0.21m)\sin32\°)}{1-\cos^232\°}}\\\\v_0=17.3m/s$

So, the speed of the ball just after the launch is 17.3m/s.

4 0

3 years ago

Energy that comes from the heat of the Earth's core is known as:

cestrela7 [59]

Geothermal energy is earths natural heat

3 0

2 years ago

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Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass

Arlecino [84]

Answer: The rank of the items is E,B,F,A,D,C..

Explanation:

In the given problem, The satellites fire rockets that provide the force needed to maintain a circular orbit around the space station. The centripetal force is acting to keep up the continuous circular motion.

The expression for the centripetal force is as follows;

$F=\frac{m\times v^{2}}{r}$