Physics, 22.08.2019 22:10 electronia
Aspring hangs vertically; its upper end is fixed and from the lower end a box weighing 19.6 n hangs. once in equilibrium, the box is pulled down by moving it 50 cm and released. knowing that k8 n/m and that the air resistance is negligible, find: (a) the law of movement of the box (b) the time necessary for the box to move from the initial position to 0.25 m above the position of balance. (c) how is the movement afocused if we repeat the experiment with a box that weighs a quarter of the original box? (d) can we change the spring in the original experiment to obtain a movement equivalent to that observed in item (c)? 2. to a spring, which stretches 50 cm when a force of 6 n is applied, a weight of 29.4 n is hung. assuming that the spring and the mass are in a fluid that offers a resistance to movement to study the movement in the following cases: (a) if the weight moves away from its equilibrium position by pulling it down 1 m, then it is released. (b) if weight is lifted, 5 m from its equilibrium position, and then dropped 3. to a spring with a constant of elasticity k 25 n/m, a 5 kg ball is hung. all the spring-mass system is in a fluid that makes the system critically damped. determine: (a) the resistance to movement offered by bluido. (b) the law of movement of the ball, if it is known that at a certain moment it passed through the equilibrium position down with a speed of 10 m/sec. 4. to a spring, which has a constant of elasticity & -5 n/m, a 1 ke pellet is hung assuming that the spring and the mass are in a fluid that offers a resistance to movement of 0.25 to study the movement if it is known that at a certain moment it passed 1.5 m below the equilibrium position with a speed of -1.5 m/sec. 5. interpret and solve the initial value problem 5x"+0.25 +2.5 15sen (2x),x(0) -1, (0) = . 1. or
Answers: 3
Physics, 22.06.2019 02:50
20. threshold braking in the vehicle's braking system occurs when a. the brake pedal is pushed, heel on floorboard, with full foot pressure. b. the brakes are exerting full braking power, without traction loss. c. the driver begins pushing down the brake pedal, with moderate slowdown. d. the brakes just begin to take hold with a gradual slowdown.
Answers: 3
Physics, 22.06.2019 12:10
The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.
Answers: 1
Physics, 22.06.2019 17:00
If a negatively charged particle is placed at rest in an electric potential field that increases in the positive x-direction, what will the particle do? a. accelerate in the positive x-direction b. remain at rest c. accelerate in the negative x-direction
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Physics, 22.06.2019 17:30
Frequency of electromagnetic waves that a radio station is assigned is called
Answers: 1
Aspring hangs vertically; its upper end is fixed and from the lower end a box weighing 19.6 n hangs...
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