Answer:
Suppose the micrometeoroid weighed 1 g = .001 kg
Suppose also the spacecraft were moving at 18,000 mph (1.5 hrs per rev)
Usually, the smaller particle would be moving but for simplicity suppose that it were stationary wrt the ground
v = 18000 miles / hr * 1500 m/mile / 3600 sec/hr = 7500 m/s
KE = 1/2 * .001 kg * (7500 m)^2 = 28,125 Joules
One can see that 28000 Joules could be damaging amount of energy
It would take at less 10 minte i guess this the right awnser
To establish equilibrium all torques need to be justified , the body needs to be in translational as well as rotational equilibrium.
<h3>What is equilibrium and why balancing the torques is not enough to establish equilibrium?</h3>
- Equilibrium is a condition of balance between forces, or influences from opposite ways .
- For a body to attain equilibrium , need to have both translational as well as rotational equilibrium.
- Force is responsible for translational equilibrium and torque is responsible for rotational equilibrium.
- Considering a rod , and applying equal forces at the ends of the rods in upward direction, and seeing the net torque to be zero.
- Hence the body needs to be in both translational and rotational equilibrium to attain equilibrium.
To know more about equilibrium visit:
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Answer:
The resistivity of the material used to make the rod is ρ= 7.5 * 10⁻⁷ Ω.m
Explanation:
R= 0.2 Ω
L= 0.8 m
S= 1.5mm*2mm= 3 mm² = 3 * 10⁻⁶ m²
ρ = (R*S)/L
ρ= 7.5 * 10⁻⁷ Ω.m
Answer: d
Explanation:
For an object to move in a uniform circular motion, only force that acts on it is the centripetal force which acts along the line joining the object and center of the circular path. The acceleration also acts in the direction of force. The centripetal acceleration acts along the radius of the circular motion path.
In the given horizontal circle, the direction of the acceleration of the object points towards d.
