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Object A has mass mA = 9 kg and initial momentum vector pA,i = < 17, -5, 0 > kg · m/s, just before it strikes object B, which has mass mB = 12 kg. Just before the collision object B has initial momentum vector pB,i = < 4, 5, 0 > kg · m/s. The forces that A and B exert on each other are very large but last for a very short time. If we choose a time interval from just before to just after the collision, what is the approximate value of the impulse applied to the two-object system due to forces exerted on the system by objects outside the system >> Fnet * delta_t =< >(vector form)
Airtight box has a removable lid of area 1x10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85x 10^5Pa. The inside of the box is completely evacuated. What is the magnitude of the force essen..
An 845-N sled is pulled a distance of 186m. The task requires 1.2 multiplied by 104 J of work and is done by pulling on a rope with a force of 133-N. At what angle is the rope held.
What is the magnitude of the potential difference between two points that are 1.15 cm and 2.99 cm from a proton? Answer in units of V.
Assume you are 80cm from a plane mirror. What area of the mirror is used to reflect rays entering one eye from a point on the tip of your nose if your pupil diameter is 5.60 mm.
What is the lamp's resistance? What fraction of the power dissipated is dissipated in batteries.
A charge particle of mass .0020kg is subjected to a 6 T magnetic field which is acts as a right angle to its motion. if the particle moves in a circle of radius .20m at a velocity of 5.0 m/s. what is the magntiude of the charge on the particle.
A 170, 35.0 cm-diameter turntables rotate on frictionless bearings at 53.0. A 20.0 block sits at the center of turntable. A compressed spring shoots the block completely outward along a frictionless groove in the surface of the turntable.
An air-track glider attached to a spring oscillates between the 15 {rm cm} marks and the 57 {rm cm} mark on the track. The glider completes 10 oscillations in 32 {rm s}.
For the 4-particle system find the moment of inertia about the y-axis, that passes through the two masses on the left-hand side of the system.
A merry-go-round (carousel) with a moment of inertia of 594 kg·m2, is initially rotating horizontally at 2 rad/s about a frictionless axis through its center.
An electric field of 220000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -10C at the spot.
You are listening a soft music with a sound level of 50 dB. A subway train passes by whose sound level is 90 dB. What is total intensity level of the combined sound in dB.
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