James Bond (87 kg) is hanging from a very light board at the top of a tower. Luckily an enemy spy is hanging from the other side and balancing the system. Bond is 3.3 m from the center and the spy is 5.72 m from the center. Set Bond as your zero point and use the center of mass to calculate the unknown mass of the enemy spy. units

James Bond (87 kg) is hanging from a very light board at the top of a tower. Luckily an enemy spy is hanging from the other side and balancing the system. Bond is 3.3 m from the center and the spy is 5.72 m from the center. Set Bond as your zero point and use the center of mass to calculate the unknown mass of the enemy spy. units

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter12: Static Equilibrium And Elasticity

Section: Chapter Questions

Problem 37P: To get up on the roof, a person (mass 70.0 kg) places 6.00-m aluminum ladder (mass 10.0 kg) against...

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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.
A beam of negligible mass and a length of 1.00 m balances two masses m₁ 16 kg and m₂ = 8 kg. The distance of m₁ from the fulcrum is 20 cm. Let the distance of m₂ from the fulcrum be d2. Assume all quantities are correct to 3 significant figures. m2 m2g (a) For first condition equilibrium is m₁g-m₂g. N=0. N O N-m₁g-m₂g-0. N+m₁g-m₂g=0. N-m₁g+m₂g=0. mi mig (b) Match the directions of rotations induced by the forces about the fulcrum: A. N no rotation B. mg clockwise C. m₂g counter-clockwise
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.
Consider the U-beam section shown in the figure below. The beam section splits into 3 segments (assuming it to be made of uniform, material and the mass of the vertical segment is double the mass of the horizontal segments). Find the y-coordinate of the center of mass from the bottom of the beam section (in cm). 120 cm 30 cm 180 cm +40 cm T30 cm ---. Origin 120 cm O a. 120.0 Ob. 177.5 12:11 ENG 18/05/2021
A person carries a plank of wood 2.00 m long with one hand pushing it down at one end with a force F1 and the other hand holding it up with a force F2 at a distance of 0.500 m from the same end of the plank. If the plank has mass 20.0 kg and the center of mass of the plank is in the middle of the plank, what are the magnitudes of the forces F1 and F2? a. F1 = 392.4 N, F2 = 196.2 N b. F1 = 392.4 N, F2 = 392.4 N c. F1 = 196.2 N, F2 = 392.4 N d. F1 = 196.2 N, F2 = 196.2 N
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 63kg beam extends horizontially from the side of a wall. A 13kg box hangs from the end of the beam. The beam is also supported by a cable that is connected to the side of the wall, the cable is also attached to the beam 3/4 of the way from the wall to the end of the beam, it makes a 32 degree angle with the beam. The beam does not have uniform mass distribution, the center of mass of the beam is 1/4 of the way from the wall to the end of the beam. The tension on the cable is 709.63N. What are the x and y components of the force the wall exerts on the beam?
A rod of length 2.85 meters is hanging from the ceiling using two strings at each end. The rod is horizontal and the tension force on one of strings is 2.14 times the tension on the other one. Deternine the distance of the center of mass of the rod from the string with higher tension. Enter numerical value of the length in unit of meters.
A person carries a plank of wood 2.00 m long with one hand pushing it down at one end with a force F, and the other hand holding it up with a force F, at a distance of 0.500 m from the same end of the plank. If the plank has mass 20.0 kg and the center of mass of the plank is in the middle of the plank, what are the magnitudes of the forces F and F,? F, = 196.2 N, E, = 392.4 N F2 F, = 392.4 N, F, = 392.4 N %3D F, = 196.2 N, F, = 196.2 N %3D 3 4 F, = 392.4 N, F, = 196.2 N || %3D
A 72 kg and 180-cm tall person lies on a light (massless) board which is supported by two scales A and B. Scale A is under the top of her head and scale B is at the bottom of her feet. If the center of mass of the person is located 100 cm from the bottom of her feet (or 80 cm from the top of her head). What will be the scale reading on scale A? KROGRAMS O a. 72 kg O b. 32 kg O c. 36 kg d. 40 kg B KELOGRAMS
A 3000-lb car is parked on a 30° slope, facing uphill. The center of mass of the car is halfway between the front and rear wheels and is 2 ft above the ground. The wheels are 8 ft apart. Find the normal force exerted by the road on the front wheels and on the rear wheels. 0 = 30° l = 2 ft 2 = 4 ft mg Hints : The car is in stationary equilibrium, so : 1) the total force on the car must be 0 (i.e., along the incline and perpendicular to it), 2) the total torque about any point must be 0. (choose as point of rotation the center of mass) Remember friction is: f = µ N Three equations , three unknowns. Solve for N1 and N2.
In order to get his car out of the mud, a man ties one end of a rope to the front bumper and the other end to a tree 7.4 m away, as shown below. He then pulls on the center of the rope with a force of 490 N, which causes its center to be displaced 0.98 m, as shown. What is the force (in N) of the rope on the car? (Enter the magnitude.) 490 N 0.98 m 7.4 m