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A 7.27 kilogram block is initially moving with some speed due to the application of a constant horizontal force of 118.3 Newton. The coefficient of kinetic friction between the block and the surface is mk = 0.172. The block moves a horizontal distance of 2.39 meter at which point its speed is 15.12 m/s. Evaluate what the initial speed of the block.
a 2.5 kg particle is in simple harmonic motion in one dimension and moves according to the equationx 6.4 mcosp3 radst
q1. if the proton is released from rest in a uniform electric field does equivalent electric potential at the protons
Two long, parallel wires separated by 3.00 cm carry currents in opposite directions. The current in one wire is 1.20 A, Is the force attractive or repulsive
question1a small steel ball bearing with a mass of 30.0 g is on a short compressed spring. while aimed vertically and
The decibel level of ajackhammer is 125 dB relative to the threshold of hearing. Determine the sound intensity produced by the jack hammer
A certain wire has a resistance of 140 Ω. What is the resistance of a second wire, made of the same material, that is 1/3 as long and has 1/5 the diameter? (answer in ohms)
An unstable nucleus of mass 2.9 10-26 kg, initially at rest at the origin of a coordinate system, Find the magnitude and direction of the velocity of the third particle
A laser beam is traveling through an unknown substance. When it encounters a boundary with air, the angle of reflection is 27.9° and the angle of refraction is 39.0°. What is the speed of light in the substance
a certain string just breaks when it is under 25 n of tension. a boy uses this string to whirl a 2-kg stone in a
A trap door, of length and width 2.35 m, is held open at an angle of 65.0° with respect to the floor. what is the torque exerted on the trap door by the rope
A 374-kg sailboat has an acceleration of 0.643 m/s2 at an angle of 58.9 ° north of east. find the direction of the net force that acts on the sailboat
A radio receiver can detect signals with electric field amplitudes as small as 250?V/m. What is the intensity of the smallest detectable signal
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