Physics, 19.11.2019 01:31 carlydays4403
If an object with mass m is dropped from rest, one model for its speed v after t seconds, taking air resistance into account, is v = mg c (1 โ eโct/m) where g is the acceleration due to gravity and c is a positive constant describing air resistance. (a) calculate lim tโ[infinity] v. 0 what is the meaning of this limit? it is the speed the object reaches before it starts to slow down. it is the time it takes for the object to stop. it is the time it takes the object to reach its maximum speed. it is the speed the object approaches as time goes on. (b) for fixed t, use l'hospital's rule to calculate lim cโ0+ v. what can you conclude about the velocity of a falling object in a vacuum? an object falling in a vacuum will accelerate at a slower rate than an object not in a vacuum. the velocity of a falling object is proportional to its mass in a vacuum. the velocity of a falling object in a vacuum is directly proportional to the amount of time it falls. the heavier the object is the faster it will fall in a vacuum.
Answers: 1
Physics, 22.06.2019 06:00
(01.02 mc) nicole pushes her bike up a hill. overhead, the sun exerts a gravitational force on earth. which statement is true about the bike and earth? they both experience contact forces. they both experience non-contact forces. the bike experiences a non-contact force and earth experiences a contact force. the bike experiences a contact force and earth experiences a non-contact force. they both experience non-contact forces.
Answers: 1
Physics, 22.06.2019 20:20
The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 โ t2)k (iv) r (t) = 2t j + (50 โ t2)k (v) r (t) = (50 โ 2t) i + 2t j + (50 โ t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?
Answers: 2
Physics, 23.06.2019 00:30
Discuss the difference between thermal energy and heat. (terrance) terrance, egolf, r., congdon, donald. physical science student text, 5th edition. bju press, 2014. vitalbook file.
Answers: 1
Physics, 23.06.2019 06:50
The results of huy's eye exam show that he is nearsighted. which explanation should huy expect to hear? "you need convex lenses to shorten the distance that light takes to focus in your eyes." "you need concave lenses to shorten the distance that light takes to focus in your eyes." "you need convex lenses to lengthen the distance that light takes to focus in your eyes." "you need concave lenses to lengthen the distance that light takes to focus in your eyes."
Answers: 1
If an object with mass m is dropped from rest, one model for its speed v after t seconds, taking air...
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