Static friction keeps the car from skidding off the road and points toward the center of the curve. By Newton's second law, the car experiences
• net vertical force
F [normal] - F [weight] = 0
• net horizontal force
F [friction] = ma = mv²/r
where v is the tangential speed of the car.
It follows that
F [normal] = F [weight] = mg
and when static friction is maximized at the car's maximum speed,
F [friction] = µ F[normal] = 0.402 mg
Solve for v :
0.402 mg = mv²/r ⇒ v = √(0.402 g (93.5 m)) ≈ 19.2 m/s
Answer:
b. a large elliptical galaxy
Explanation:
In elliptical galaxies the stars are grouped in an elliptical shape, it has a low quantity of gas and dust in comparison to spiral galaxies, and its stars belong to an old population, there is not new stellar formation in it.
The stars orbit in a messy way which made to believe that they form from the merger of galaxies.
They are also really massive (around solar masses).
The most massive and luminous can be found in the center of cluster of galaxies.
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True
Explanation:
Average speed is a scalar magnitude as opposed to average velocity which is a vector. The unit of measurement in the International System (S.I.) of the average speed is the meter per second (m/s).
Answer:
a)
b)
c)
Explanation:
We have:
B: is the magnetic field = (2.66x10⁻³ T)(-)
v: is the velocity of the proton = (2930 m/s)
a) To find the magnitude of the net force (F) we need to use the Lorentz force equation:
(1)
E: is the electric field = (5.51 V/m)
q: is the proton charge = 1.6x10⁻¹⁹ C
Hence, the magnitude of the net force is:
b) When E = (5.51 V/m)(), the net force is (equation 1):
Then, the magnitude of the net force is:
c) When E = (5.51 V/m)(), the net force is:
Hence, the magnitude of the net force is:
I hope it helps you!