Scenario: You want to launch a projectile with a cylindrical shape, radius r and length L. It is expected that the movement
that the translational movement approaches a parabolic shot, but considering its shape, it can be modified
its trajectory. Consider that the initial speed of the projectile is v0 and that it is thrown at an angle q. Skip effects
friction with air.
1. Using the point object approximation, write an expression for the maximum height that the
projectile will hit. Obtain an expression for the range of the projectile and find the angle at which it
range is maximum.
2. Considering the cylindrical shape of the actual projectile and using the principle of conservation of energy,
both translational and rotational, obtain expressions analogous to those of the previous point, considering
that the object begins to rotate about its axis with a constant angular speed, w.
3. Now suppose that from the beginning of its trajectory, the projectile begins to rotate with an angular speed
constant s along its axis, in addition to having the angular speed w around its axis. Find
expressions for maximum height and reach What will happen to maximum height and reach with respect to
to the previous points?
4. Compare the expressions in items 1, 2, and 3, and answer the following questions: How do you modify
the maximum height that the projectile will reach, in which case it increases and in which it decreases? How do you modify
the range of the projectile, in which case it increases and in which it decreases? Discuss your answers.
5. Quantitatively compare cases 1 and 3 with the following values:
m = 20 kg, v0 = 100 m / s, q = 40º, r = 20 cm, L = 1 m, w = 1 rev / s, s = 0.5 rev / s.
Answers: 2
Physics, 22.06.2019 01:30
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Answers: 1
Physics, 22.06.2019 18:00
Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.
Answers: 1
Physics, 22.06.2019 21:00
Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2
Answers: 1
Scenario: You want to launch a projectile with a cylindrical shape, radius r and length L. It is exp...
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