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A 32 kg child sits at one end of a3.4 m long seesaw. Where should her 65 kgfather sit so the center of mass will be at the center of theseesaw?
A 200, 47.0 cm-diameter turntables rotate on frictionless bearings at 70. A 24.0 block sits at the center of the turntable. A compressed spring shoots the block radically outward along the frictionless groove in the surface of turntable.
Sodium ions (Na+) move at 0.843 m/s through a bloodstream in the arm of a person standing near a large magnet. what would be the magnetic force on the arm
A car was moving on the highway at a speed of 90 km/h. The driver then stepped on the gas and started to accelerate uniformly at a rate of 0.26 m/s2, and he was able to overtake a truck in 35 s. What was the final speed of the car after this time?
A 140 g air-track glider is attached to a spring. The glider is pushed in 12.00 cm and released. A student with a stopwatch finds that 9 oscillations take 10.0 s.
A 120-V motor has mechanical power output of 2.70 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
An automobile suspension involves both leaf springs with stiffness k and shock absorbers resist motion with a force -uv. The system is critically damped. If a car has mass 2000 kg and has shock absorbers with u = 2.5 x10^4 kg/s, how much should the c..
Suppose you drop a feather and a steel ball of equal masses (0.010 kg) at the same time from a height of 1.9 m and you are told that the feather hits the floor 4.5 s after the steel ball. Estimate the feather's drag coefficient
q1. an object falls because of gravity at a rate of -9.80 ms2 - sign is indicative of a downward direction for 10.00
A charged object has two forces acting on it: F1 (4 Newtons, pointing up at 120 degrees from the positive x axis), Compute the total (net) force acting on the object
If the transformer is connected the wrong way around the circuit, what voltage is supplied to the doorbell
two identical conducting spheres fixed in place attract each other with an electrostatic force of -0.1812 n when
A 0.320 kg croquet ball makes an elastic head-on collision with a second ball initially at rest. The second ball moves off with half the original speed of the first ball. (a) What is the mass of the second ball? kg (b) What fraction of the original k..
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