Figure Q14.3 shows the position-versus-time graph of a particle in SHM. Figure Q14.3 a. At what time or times is the particle moving to the right at maximum speed? b. At what time or times is the particle moving to the left at maximum speed? c. At what time or times is the particle instantaneously at rest?
Figure Q14.3 shows the position-versus-time graph of a particle in SHM. Figure Q14.3 a. At what time or times is the particle moving to the right at maximum speed? b. At what time or times is the particle moving to the left at maximum speed? c. At what time or times is the particle instantaneously at rest?
Figure Q14.3 shows the position-versus-time graph of a particle in SHM.
Figure Q14.3
a. At what time or times is the particle moving to the right at maximum speed?
b. At what time or times is the particle moving to the left at maximum speed?
c. At what time or times is the particle instantaneously at rest?
Definition Definition Special type of oscillation where the force of restoration is directly proportional to the displacement of the object from its mean or initial position. If an object is in motion such that the acceleration of the object is directly proportional to its displacement (which helps the moving object return to its resting position) then the object is said to undergo a simple harmonic motion. An object undergoing SHM always moves like a wave.
Three charged particles are at the corners of an equilateral triangle as shown in the figure below. (Let q = 2.00 μC, and
L = 0.750 m.)
y
7.00 με
60.0°
L
9
-4.00 μC
x
(a) Calculate the electric field at the position of charge q due to the 7.00-μC and -4.00-μC charges.
112
Once you calculate the magnitude of the field contribution from each charge you need to add these as vectors.
KN/CI + 64
×
Think carefully about the direction of the field due to the 7.00-μC charge. KN/Cĵ
(b) Use your answer to part (a) to determine the force on charge q.
240.0
If you know the electric field at a particular point, how do you find the force that acts on a charge at that point? mN
Î + 194.0
×
If you know the electric field at a particular point, how do you find the force that acts on a charge at that point? mN
In the Donkey Kong Country video games you often get around by shooting yourself out of barrel cannons. Donkey Kong wants to launch out of one barrel and land in a different one that is a distance in x of 9.28 m away. To do so he launches himself at a velocity of 22.6 m/s at an angle of 30.0°. At what height does the 2nd barrel need to be for Donkey Kong to land in it? (measure from the height of barrel 1, aka y0=0)
For which value of θ is the range of a projectile fired from ground level a maximum?
90° above the horizontal
45° above the horizontal
55° above the horizontal
30° above the horizontal
60° above the horizontal
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