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Assuming that the collision is instantaneous and perfectly elastic, what is the velocity of the wedge after the collision?
The same ball is shot straight up a second time from the same gun, but this time the spring is compressed only half as far before firing. How far up does the ball go this time? Neglect friction. As
From the skidmarks after the collision, it is deduced that the mangled wreckage, which sticks to- gether after the collision was skidding at angle 20? with respect to the initial direction of the ca
Bonnie and Clyde are sliding 450 bank safe across the floor to their getaway car. The safe slides with a constant speed if Clyde pushes from behind with 440 of force while Bonnie pulls forward on a
The radius of the rear wheel is 66.0 cm. At what rate should the cyclist be pedaling in order for the bicycle to have a forward speed of 10.0 m/s?
Close to the wire is a square loop of copper wire that carries a 2.17 A current in the direction shown. The near side of the loop is d = 46.3 cm away from the wire. The length of each side of the sq
A more realistic car would cause the wheels to spin in a manner that would result in the ground pushing it forward with a constant force (in contrast to the constant power in Part A). If such a spo
A butterfly at eye level is 18 cm in front of an plane mirror. You are behind the butterfly, 52 cm from the mirror. What is the distance between your eye and the image of the butterfly in the mirro
A person in an elevator is holding a 25 kg block by a cord rated to withstand a tension of 335 N. Starting from rest, the elevator begins to move upwards at a constant acceleration and the cord hold
In the reference frame of the pion, how far does the pion travel in a typical lifetime of 2.6 × 10^ -8 seconds? Answer in units of m. What is this distance in the laboratory's frame? Answer in
Two circus performers, Jack and Jill, whose total mass is 120 kg, start a swing which is 5.0 m long such that initially the rope attached to their swing makes an angle of 36 degrees with the horizo
Calculate the moment about the knife edge of the force due to mass of the rule when the rule balances on the knife.
If a car traveling at 62 km/h will skid 26 m when its brakes lock, how far will it skid if it is traveling at 120 km/h when its brakes lock?
A 3.50 g bullet is fired horizontally at two blocks at rest on a frictionless table. The bullet passes through block 1 (mass 1.20 kg) and embeds itself in block 2 (mass 1.80 kg). The blocks end up w
A proton has a mass of 1.67 x 10^-27 kg and a charge of 1.60 x 10^-19 C. What is the gravitational force on a single proton at Earth's surface?
Calculate the current density, J, due to the gravitational drift of electrons and protons, where the gravitational acceleration, g, is along the negative z-axis.
Calculate the work done in lifting a 560 N barbell 1.6 m above the floor? What is the potential energy of the barbell when it is lifted to this height?
A person of mass 72 kg stands at the center of a rotating merry-go-round platform of radius 2.8 m and moment of inertia 930 kgcdot m^2. The platform rotates without friction with angular velocity 2
The battery has internal resistance of 0.100 Ω, and the rod and rails have negligible resistance. A 1.96 T magnetic field is directed perpendicular to the plane of the circuit.
A 55-kg person on skis is going down a hill sloped at 30° from the horizontal. The coefficient of friction between the skis and the snow is 0.17. What would be the magnitude of the acceleration?
A backpack full of books weighing 59.0 N rests on a table in a physics laboratory classroom. A spring with a force constant of 150 N/m is attached to the backpack and pulled horizontally, as indica
A bicycle wheel has a diameter of 64.1 cm and a mass of 1.81 kg. Assume that the wheel is a hoop with all of the mass concentrated on the outside radius. The bicycle is placed on a stationary stand
The second object has its mass changed to 2m2, and the distance is changed to r/4. What is the magnitude of the new gravitational force?
A car travels along a straight line at a constant speed of 45.5 mi/h for a distance d and then another distance d in the same direction at another constant speed. The average velocity for the entire
A 25 kg chair initially at rest on a horizontal floor requires 373 N horizontal force to set it in motion. Once the chair is in motion, a 308 N horizontal force keeps it moving at a constant velocit