A massless spring with constant k is mounted on a turntable of rotational inertia I , as shown in Fig. 11.19. The turntable is on a frictionless vertical axle, though initially it’s not rotating. The spring is compressed a distance Δ x from its equilibrium, with a mass m placed against it. When the spring is released, the mass moves at right angles to a line through the turntable’s center, at a distance b from the center, and slides without friction across the table and off the edge. Find expressions for (a) the linear speed of the mass and (b) the rotational speed of the turntable. ( Hint: What’s conserved?) FIGURE 11.19 Problem 58
A massless spring with constant k is mounted on a turntable of rotational inertia I , as shown in Fig. 11.19. The turntable is on a frictionless vertical axle, though initially it’s not rotating. The spring is compressed a distance Δ x from its equilibrium, with a mass m placed against it. When the spring is released, the mass moves at right angles to a line through the turntable’s center, at a distance b from the center, and slides without friction across the table and off the edge. Find expressions for (a) the linear speed of the mass and (b) the rotational speed of the turntable. ( Hint: What’s conserved?) FIGURE 11.19 Problem 58
A massless spring with constant k is mounted on a turntable of rotational inertia I, as shown in Fig. 11.19. The turntable is on a frictionless vertical axle, though initially it’s not rotating. The spring is compressed a distance Δx from its equilibrium, with a mass m placed against it. When the spring is released, the mass moves at right angles to a line through the turntable’s center, at a distance b from the center, and slides without friction across the table and off the edge. Find expressions for (a) the linear speed of the mass and (b) the rotational speed of the turntable. (Hint: What’s conserved?)
suggest a reason ultrasound cleaning is better than cleaning by hand?
Checkpoint 4
The figure shows four orientations of an electric di-
pole in an external electric field. Rank the orienta-
tions according to (a) the magnitude of the torque
on the dipole and (b) the potential energy of the di-
pole, greatest first.
(1)
(2)
E
(4)
What is integrated science.
What is fractional distillation
What is simple distillation
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