9. A block with mass 0.500 kg is released from rest at the top of a vertical semicircular frictionless track that has radius 2.00 m. What is the normal force that the track exerts on the block as the block slides though the bottom of the track? 0.5ko (a) 4.9 N (6) 9.8 N T 14.7 la) 20.0 N le none of these answers botto mof track 2.0m

9. A block with mass 0.500 kg is released from rest at the top of a vertical semicircular frictionless track that has radius 2.00 m. What is the normal force that the track exerts on the block as the block slides though the bottom of the track? 0.5ko (a) 4.9 N (6) 9.8 N T 14.7 la) 20.0 N le none of these answers botto mof track 2.0m

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter7: Rotational Motion And The Law Of Gravity

Section: Chapter Questions

Problem 27P: An air puck of mass m1 = 0.25 kg is tied to a siring and allowed to revolve in a circle of radius R...

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An air puck of mass m1 = 0.25 kg is tied to a siring and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of m2 = 1.0 kg is tied to it (Fig. P7.27). The suspended mass remains in equilibrium while the puck on the tabletop revolves, (a) What is the tension in the string? (b) What is the horizontal force acting on the puck? (c) What is the speed of the puck? Figure P7.27
If global warming continues over the next one hundred years, it is likely that some polar ice will melt and the water will be distributed closer to the equator, (a) How would that change the moment of inertia of the Earth? (b) Would the duration of the day (one revolution) increase or decrease?
(a) Calculate Earth's mass given the acceleration due to gravity at the North Pole is 9.830 m/s2 and the radius of the Earth is 6371 km from center to pole. (b) Compare this with the accepted value of 5.9791024 kg.
Suppose a piece of dust finds itself on a CD. If the spin rate of the CD is 500 rpm, and the piece of dust is 4.3 cm from the center, what is the total distance traveled by the dust in 3 minutes? (Ignore accelerations due to getting the CD rotating.)
If global warming continues, its likely that some ice from the polar ice caps of the Earth will melt and the water will be distributed closer to the equator. If this occurs, would the length of the day (one rotation) (a) increase, (b) decrease, or (c) remain the same?
An air puck of mass m1 = 0.25 kg is tied to a siring and allowed to revolve in a circle of radius R = 1.0 m on a frictionless horizontal table. The other end of the string passes through a hole in the center of the table, and a mass of m2 = 1.0 kg is tied to it (Fig. P7.27). The suspended mass remains in equilibrium while the puck on the tabletop revolves, (a) What is the tension in the string? (b) What is the horizontal force acting on the puck? (c) What is the speed of the puck? Figure P7.27
35 - If a = 10 cm and b = 25 cm, calculate the net torque of the system with respect to the origin. a) -3.55Nm B) 1.4Nm NS) 2.25Nm D) -3.1Nm TO) 2.57Nm
By how many newtons does the weight of a 191-lb person change when he goes from sea level to an altitude of 10.0 miles if we neglect the earth's rotational effects? (The mean radius of the Earth is 6.38 × 10^6 m, G = 6.67 × 10^ - 11 N ∙ m^2/kg^2.)
A 0.20 kg yo-yo consists of two solid disks of radius 7.30 cm joined together by a massless rod of radius 1.0 cm and a string wrapped around the rod. One end of the string is held fixed and is under constant tension T as the yo-yo is released. (a) Find the acceleration of the yo-yo. (solved).35 m/s2(b) Find the tension T. (unsolved)
In the Cavendish balance apparatus shown in Figure 13.4 in the textbook, suppose that m1 = 1.50 kg, m2 = 27.0 kg, and the rod connecting each of the pairs of masses is 31.0 cm long. Once the system reaches equilibrium, each pair of masses, m1 and m2, are separated by a distance of 13.0 cm center-to-center. A. Find the magnitude of the net force on one of the small masses, m1. B. Find the gravitational torque (about the rotation axis) on the rotating part of the apparatus. Ignore any forces on the connecting rods in your calculation. C. Suggest some ways to improve the sensitivity of this experiment.
A planet similar to the Earth has a radius 4.3 × 106 m and has an acceleration of gravity of 10 m/s 2 on the planet’s surface. The planet rotates about its axis with a period of 25 h. Imagine that the rotational speed can be increased. If an object at the equator is to have zero apparent weight, what is the new period? Answer in units of h.
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