To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 4.60 m apart. (a) If the left scale reads 349 N, and the right scale reads 164 N, find the student's mass. kg (b) Find the distance from the student's head to his center of mass.

To determine the location of his center of mass, a physics student lies on a lightweight plank supported by two scales L = 4.60 m apart. (a) If the left scale reads 349 N, and the right scale reads 164 N, find the student's mass. kg (b) Find the distance from the student's head to his center of mass.

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter10: Rotational Motion

Section: Chapter Questions

Problem 11OQ

See similar textbooks

Similar questions

The board sandwiched between two other boards in Figure P4.91 weighs 95.5 N. If the coefficient of friction between the boards is 0.663, what must be the magnitude of the compression forces (assumed to be horizontal) acting on both sides of the center board to keep it from slipping? Figure P4.91
To get up on the roof, a person (mass 70.0 kg) places 6.00-m aluminum ladder (mass 10.0 kg) against the house on a concrete pad with the base of ladder 2.00 m from the house. The ladder rests against a plastic rain gutter, which we can assume to frictionless. The center of ladder is 2.00 m from the bottom. The person is standing 3.00 m from the bottom. Find the normal reaction and friction forces on the ladder at its base.
The center of mass of the arm shown in the figure is at point A. Find the magnitudes (in N) of the tension force Ft and the force Fs which hold the arm in equilibrium. (Let θ = 22.0°.) Assume the weight of the arm is 42.9 N.
A 200-kg robotic arm at an assembly plant is extended horizontally (see figure below). The massless support rope attached at point B makes an angle of 12.0° with the horizontal, and the center of mass of the arm is at point C. (Assume that L1 = 1.42 m and L2 = 2.62 m.) (a) What is the tension in the support rope? (b) What are the magnitude and direction of the force exerted by the hinge A on the robotic arm to keep the arm in the horizontal position?magnitude = _____ Ndirection = _______° counterclockwise from the +x axis
Consider a method for measuring the mass of a person’s arm in anatomical studies. The subject lies on her back, extends her relaxed arm to the side and two scales are placed below the arm. One is placed under the elbow and the other under the back of her hand. Construct a problem in which you calculate the mass of the arm and find its center of mass based on the scale readings and the distances of the scales from the shoulder joint. You must include a free body diagram of the arm to direct the analysis. Consider changing the position of the scale under the hand to provide more information, if needed. You may wish to consult references to obtain reasonable mass values.
Two uniform, 75.0 g marbles 2.00 cm in diameter are stacked as shown in Fig. in a container that is 3.00 cm wide. (a) Find the force that the container exerts on the marbles at the points of contact A, B, and C. (b) What force does each marble exert on the other?
For a meter stick of mass 147.89 g, it is found that its weight can be balanced by hanging a 183.99 g mass at the 95.00 cm mark. Where does the center of the weight of the meter stick locate on the meter stick? Enter the number in cm unit.
A cargo ship has been badly loaded and is dangerously down at the stern. Fortunately, there is a massless crane based on the ship near its bow. The captain decides to balance the ship by using the crane to lift a container from near the stern, move it horizontally forwards, and lower it onto the bow. When does the ship's angle begin to improve?
A 200 N sign hangs from the middle of a cable between two buildings. The ends of each cable are attached to each building at the same height. The cable cannot exceed 1500 N without breaking. Find the minimum angle that the cable can make from the horizontal.
A horizontal force F pushes against a block of mass m. The mass m in turn pushes against a bigger block of mass M. There isn't friction any between the larger block and the table, but there is friction in between the blocks (coef. of static friction is μs). What's the smallest force F that will hold the smaller mass m m against the larger mass M without letting the smaller mass m fall down?
Two telephone poles are separated by 40 m and connected by a wire. A bird of mass 0.5 kg lands on the wire midway between the poles, causing the wire to sag 2 m below horizontal. Assuming the wire has negligible mass, what is the tension in the wire?
A wedge of total mass M, of metal with uniform thickness 1 m and uniform mass density p (kg/m³) is shown below. The wedge has a base of length a, and a height of length b. The wedge is supported by two posts. In a previous question, you found that 2CM, the 2 coordinate of the center of 2a mass of the wedge is located at 2. Find an expression for the normal force by post 2 on the wedge. 3 Post 1 Post 2 ΜΕ ΑΣΦ Submit response