Answer:
f = 0.5 Hz
v = 8 m/s
Explanation:
f = 1/T
f = 1/(2) = 0.5 Hz
v = λf
v = (2)(4) = 8 m/s
The car reaches its top speed when the constant thrust force equals the opposing air resistance force, resulting in zero net external force and constant velocity. This balance between thrust and resistance forces determines the top speed.
When the applied thrust force typically supplied by the engine equals the total of the opposing forces pushing on the vehicle, the vehicle reaches its maximum speed.
Air resistance, or drag, is the main opposing force and it grows as the car's speed squares. The car first accelerates because the propulsion force overcomes this resistance as it accelerates. But the air resistance force likewise increases with the car's speed until it reaches the same level as the thrust force.
The car now maintains a steady velocity when it reaches its maximum speed and the net external force acting on it zeroes. The maximum speed is also influenced by other elements like mechanical efficiency and rolling resistance.
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Given v_in = 20 m/s and a = 3 m/s2, assuming that the bodymoves at constant acceleration, the motion is modeled by the equation:
s(t) = (v_in)t + (1/2)a(t^2)
where s(t) is the distance traveled
substituting the given,
s(t) = 20t + (3/2)(t^2)
at t = 3
s(t) = 20(3) + (3/2)(3)^2
= 73.5 m
B. convex mirror.
C. concave mirror.
D. virtual mirror.
Answer:
The correct answer is option A, Plane Mirror
Explanation:
A plane mirror has a flat surface while remaining concave and convex mirror have bulging surfaces. A concave mirror is a converging mirror while a convex mirror is a diverging mirror. Having a planar surface, the angle of incidence and reflection is equal in a plane mirror. There is nothing like a virtual mirror however the mirrors have the ability to form virtual image.
Thus among all the options, option A is correct
B) The particles have sufficient energy to become an ionized gas and are in the most common state of matter in the universe.
C) The particles are not able to move out of their positions relative to one another, but do have small vibrational movements.
D) The particles are not bound to one another, move quickly, have a low density, and are able to spread apart from one another if unconstrained.
Brad and Matt are working in the lab. They noticed that when they mixed two dilute solutions together, the reaction between them happened very slowly. Which of Matt's suggestions would BEST help to increase the rate of this reaction?
A) increase the concentration of both solutions
B) decrease the concentration of both solutions
C) increase the concentration of one of the solutions
D) decrease the concentration of one of the solutions
Identify the correct order of increasing intermolecular force of attraction for the three most common states of matter.
A) liquid → solid → gas
B) solid → liquid → gas
C) gas → liquid → solid
D) gas → solid → liquid