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A small sphere of charge q1 = 0.848 µC hangs from the end of a spring as in figure (a). When another small sphere of charge q2 = ?0.594 µC is held beneath the first sphere as in figure (b), the spring stretches by d = 3.18 cm from its original length and reaches a new equilibrium position with a separation between the charges of r = 4.85 cm. What is the force constant of the spring?
A 7.80-g bullet moving at 560 m/s penetrates a tree trunk to a depth of 5.2 cm. Use work and energy considerations to find the average frictional force that stops the bullet
A weightlifter's barbell consists of two 15-kg masses on the ends of a 20-kg rod 1.6 m long. find the magnitude of the barbell's angular momentum
A boat has a mass of 6800 kg, Its engines generate a drive force of 4100 N, due north, while the wind exerts a force of 800 N, What is the magnitude and direction of the boat's acceleration
A sled weighing 189N rests on a 15° incline, held in place by static friction. The coefficient of static friction is 0.50.
A patient walks across a force platform and the forces exerted by the patients foot during a step is recorded. What is the direction of the resultant force
A glass slab surrounded by air causes a sideways displacement in a beam of light.
A merry go round has a moment of inertia of 1000 kgm^2. When it is rotating at 2.62 rad/sec, the motor shut off. How large was the friction torque
Two 1.5cm -diameter disks face each other, 1.1mm apart. They are charged to ±20nC. What is the electric field strength between the disks
A golf ball of mass 0.045 kg is hit off the tee at a speed of 32m/s. Find the average force exerted on the ball by the golf club
q1. a flywheel having constant angular acceleration requires 4.60 to rotate through 170. its angular velocity at the
q1. for a damped oscillator with a mass of 280 g a spring constant 140 nm and a damping coefficient of 74 gs what is
Suppose a straight 1.35mm -diameter copper wire could just "float" horizontally in air because of the force due to the Earth's magnetic field B, What current would the wire carry
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