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A 11.0 g bullet is fired horizontally into a 103 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring of constant 154 N/m. The bullet becomes embed
A unit of area often used in measuring land areas is the hectare defined as 104 m2. An open pit coal mine consumed 75 hectares of land down to a depth of 26 m each year. What is the volume of earth
A uniform bar 3 m long weighs 67lbs. A 22N weight is hanging at the end of the bar. At what point must the bar be supported for the remain horizontal ??
A hockey player accelerates a puck (m = 0.167 kg) from rest to a velocity of 50 m/s in 0.0121 sec. Determine the acceleration of the puck and the force applied by the hockey stick to the puck.
If you walk toward a plane mirror at 1.5 m/s, with what velocity will your image approach you? If instead you remain at rest and it is the mirror being moved away from you at 1.5 m/s, with what vel
Determine the total force on the bottom of a swimming pool 26.5 m by 6.0 m whose uniform depth is 2.0 m?
A 2.10 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0310 m. The spring has force constant 810 N/m. The coefficient of kinetic friction between the
The disk is rotating clockwise with angular speed w0 = 0.4 rad/s. Just after the impact, what is the angular speed of the combined system of wheel plus clay?
A .255 kg mass is attached to a spring and executes simple harmonic motion with a period of .56 s. The total energy of the system is 3.6 J. Find the amplitude of the motion. Answer in units of m
Beats and Standing Waves Two loudspeakers are placed at either end of a gymnasium, both pointing toward the center of the gym and equidistant from it. The speakers emit 266 {rm Hz} sound that is in
A sled weighing 183 N rests on a 15° incline, held in place by static friction. The coefficient of static friction is 0.50. What is the magnitude of the force exerted on the child by the incline?
If a proton is released from rest in a uniform electric field, does the corresponding electric potential at the proton's changing locations increase or decrease? What about the electric potential e
If the mass of both weights is 150 gm, the first mass is located 30 north of east, the second mass is located 30 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a volta
Occupy the NE, SE, and SW corners, determine the coordinates of the {rm CM} of the loaded ferryboat relative to the center of the raft. Take the origin to be at the {rm CM} of the raft.
A shell of mass M is fired as shown on the figure, at the top of its trajectory; the shell explodes into two fragments. One fragment, whose mass is M/3 has horizontal speed to the left after the exp
A car traveling at a speed of vo = 59 m/s stops smoothly (that is, its deceleration is constant) over a distance of d = 93 m. a) What is its acceleration during the time it is stopping?
Assume that 0.10 mol of argon gas is admitted to an evacuated 50 cm3 container at 20° C. The gas then undergoes isobaric heating to a temperature of 300° C. What is the final pressure of th
Evaluate alpha at t = 3.2 s. What is the average angular velocity between t = 2.0 s and t =3.2 s? What is the average angular acceleration between t = 2.0 s and t =3.2 s?
Calculate the sound power (the energy per second) incident on an eardrum at the threshold of hearing and the threshold of pain?
If half the potential energy of this water were converted into electric energy, how much power would be produced by these falls?
Coherent light that contains two wavelengths, 660 and 470 , passes through two narrow slits with a separation of 0.350 and an interference pattern is observed on a screen which is a distance 5.30 f
A person exerts a horizontal force of 33 N on the end of a door 94 cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door?
If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot
The cockroach's speed (relative to the ground) is 3.00 m/s, and the lazy Susan turns clockwise with angular velocity ω0 = 3.03 rad/s. The cockroach finds a bread crumb on the rim and, of cours
Suppose that while moving into an apartment you move a refrigerator into place by sliding it across the floor. The refrigerator weighs 1502 N and the coefficient of static friction between the floo