6. Water is placed in a home-made jack. The cross sectional areas A1 and A2 are circular, with radii 2.00 em and 15.00 cm, respectively. The pistons are lightweight and frictionless. A person (mass 50 kg) stands on the platform at A2. What is the amount of force needed in A to support the weight of the person?
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- During the downward portion of a biceps curl the velocity of the dumbbell is held constant. If the dumbbell weighs 50 N what is the internal force produced by the muscles? a. 50 N b. < 50 N c. > 50 N d. need more informationA 2×12 board of airdried Southern Yellow Pine (~12% moisture) is about 2.18 kg per linear foot. A physicist and his wife carry a 16-foot length of Southern Yellow Pine lumber, the physicist gallantly carries the board from one end while his wife carries the board 4 feet from the other end. How much weight is each spouse carrying? This is an equilibrium problem. Assume the board is perfectly uniform.Q Search the web.. f a New Tab Bb Announcements - PH O Microsoft Word - 10-4 x O W12C2PRACTICEEXAN X b bartleby - Bing b bartleby - Bing b My Questions | bartlet x A Not secure | faculty.ccbcmd.edu/~dbaum/PHYS151S21/10-4.pdf Sign in ... 10-4) A solid cylinder (mass M and radius R) on a table has a mechanism that attaches a spring (of constant k) to its central axis. The other end of the spring is fixed, so that the spring is horizontal. cylinder is able to roll on the table without slipping. Let's pull the mass to one side and release it so that it rolls back and forth. The Show that the motion of the center of mass is simple harmonic, and find the frequency of ocillation, w. HINT: There are two ways (at least) to do this. Each involves comparing information about this system to the simple harmonic ocillator we know, the mass on a spring. If you can get the force/torque equation to look like -kx = max or you can get the energy budget to look like /2mv? + /2kx? = ETOTAL, then the motion…
- explanations pleaseJosh has just raised a 2.5 kg bucket of water using a well’s winch when he accidentally lets go of the handle. The winch consists of a rope wrapped around a 3.0 kg, 4.0-cm-diameter cylinder, which rotates on an axle through the center. The bucket is released from rest 4.0 m above the water level of the well. How long does it take to reach the water?Question 2: #52 An 80 kg construction worker sits down 2.0 m from the end of a 1450 kg steel beam to eat his lunch, as shown in Figure below. The cable supporting the beam is rated at 15,000 N. Should the worker be worried?
- Modern commercial airliners are largely made of aluminum, a light and strong metal. But the fact that aluminum is cheap enough that airplanes can be made out of it is a bit of historical luck. Before the discovery of the Hall-Héroult process in 1886, aluminum was as rare and expensive as gold. What would happen if airplanes had to be made of steel? The fuselage of the Boeing 747, which can carry 400 passengers, is approximately a hollow aluminum cylinder without ends, 70.7 m long, 6.5 m wide, and 2.5 mm thick (see sketch at right). The fuselage of an airplane Suppose this fuselage was made of steel (density 7.87 g/cm³) instead of aluminum (density 2.70 g/cm³), and let's say the average passenger has a mass of 79 kg. We'll also assume the engines can't lift any greater mass than they already do. Calculate the number of passengers that the Boeing 747 could carry if its fuselage was made of steel. 0 XA 0.50-mm-radius fishing line made of nylon is 100 m long when no forces are applied. A fish is hooked and pulls with a tension force Of 250 N. What is the elongation?