8. A mass weighing 8 pounds stretches a spring 2 feet. Assuming that a damping force is numerically equal to 2 times the instantaneous velocity acts on the system, determine the equation of motion if the mass is initially released from equilibrium position with an upward velocity of 3 feet per second.

Q: where did the 20 come from for 20t

A:

Q: 34. At time t = 0 two figure skaters are moving together over ice with negligible friction, as shown…

A: This question can be solved by the laws of kinematics and conservation laws in physics.

Q: 1. The rectangular framework shown in the next slide is subjected to the indicated non-concurrent…

A: In order to calculate the net force , we first need to  write the components of each force in x and…

Q: Let E := Egi+ E4j+ E2k and H := Hi+ Hyj+H¿k be two vectors assumed to have continuous partial…

A: Given,∇.E=0∇.H=0∇×E=-1c∂H∂t∇×H=1c∂E∂t

Q: 6. The speed of sound in air at 20'C is 344 m/s. What is the wavelength of a sound wave in air at…

A: Speed of sound is given by     Speed of sound = Frequency  of sound × wavelength  of sound

Q: B A coin sits on a rotating turntable as shown in the figure. At the time shown in the figure, which…

A: We need to say what the direction of friction will be on the coin on turntable.

Q: The two charges in the figure below are separated by a distance d = 1.50 cm, and Q = +5.40 nC. B %3D…

A:

Q: a hard-thrown 0.410-kg 42. What is the speed of a garbage truck that is 1.20×10*kg and is initially…

A: Given  Mass of garbage truck M=1.20×104 kg Initial speed of garbage truck u1=25m/s Mass of trash can…

Q: where is the 36 coming from?. I am confused.

A: Given data: force exerted by the two dust charged particles is according to the Coulomb's law,force…

Q: A uniform magnetic field with B = 2.7i [T] passes through a hemispherical shell oriented with the…

A: Magnetic flux is a measure of the strength of a magnetic field passing through a given area. It is…

Q: Calculate the energy of the five non interacting spin 1 particles in a three-dimensional box of…

A:

Q: Two forces of magnitude TA= 7803 lb and TB= 14237 lb are applied as shown to a welded connection.…

A: Given, TA= 7803 lbTB= 14237 lbθ= 48°

Q: 1. Determine the force of gravity keeping the Earth in its orbit around the sun. 2. A 222 kg weather…

A:

Q: The driver of an SUV (m= 1800 kg) moving at a velocity of 3.50 m/s isn't paying attention and rear…

A: Mass of the SUV is M = 1800 kg Speed of the SUV is u = 3.50 m/s Mass of the car is m = 1200 kg Speed…

Q: Two small, positively charged spheres have a combined charge of 36.0 x 10-5 C. If each sphere is…

A:

Q: In the image below there exists a square 3 cm on each side with different points and charges. On q1…

A: Electric field due a charge (q) at a point distance r from the charge is given byE→=kqr2here k=…

Q: force acting on the block is

A: Given; mass,m=1 kgForce ,f=103NIt is applied horizontlly on a block.

Q: 37. For each of the thin lenses (L and L) shown in Fig- ure 24.48, the index of refraction of the…

A: The lens maker's formula is given as: 1f=(n-1)(1R1-1R2) wheren is the refractive index of the lensR1…

Q: Simple routine measurements of voltage and current can help determine if there are problems in an…

A: When Voltage and current are measured over time, we can find faults in faulty wiring, electrical…

Q: Draw Free body diagram of all the forces acting on the child as the system? Draw Free body diagram…

A:

Q: 7. The inner and outer surfaces of a 5 meters x 6 meters brick wall of thickness 0.3 meters and…

A:

Q: 48. You are working with the formula V = ²h. You are given values of r= 1.00 ft and h = 2.00 ft.…

A: Detailed solution of given question is given in below steps.

Q: Three positive charges are located at the corners of an equilateral triangle as in the figure below.…

A: the potential due to a point charge q at a point r distance away is given as,v=kqr, where k = 14π∈o

Q: why isn't it e

A: When a ball moves, it picks up momentum, but when we grab it, that momentum is transferred to our…

Q: 3. Suppose that Young's experiment is performed with the monochromatic light of wavelength 450 nm.…

A:

Q: How much work is done (by a battery, generator, or some other source of potential difference) in…

A:

Q: Determine the distance h of the symmetric beam cross section to the locate the centroid given that…

A: a=6.8mm b=10.5 mm  C=20.5mm  d=117.2mm

Q: A car created 68.5 m long skid marks at a traffic wreck scene. A State Patrol investigator uses a…

A:

Q: If a quasar is 1,980 times more luminous than an entire galaxy, what is the absolute magnitude of…

A: Given: Luminous Intensity of Entire Galaxy,IA=ILuminous Intensity of Quasar,IB=1980IA=1980IAbsolute…

Q: A capacitor stores charge q at a potential difference AV. If the voltage applied by a battery to the…

A: The capacitance is defined as the ability to store a charge Q ⇒Q=CV, where C is the capacitance, V…

Q: The force of attraction is weaker if : A.the distance of separation is zero B.the distance of…

A:

Q: • A converging lens has a focal length of 14.0 cm. For each of two objects located to the left of…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Q. 30: A hollow spherical conductor of radius R has a charge Q on it. A small dent on the surface…

A: Given, The conductor radius =R Charge=Q The volume is decreased by 2% because of a dent.…

Q: Calculate the cyclotron frequency of an a-particle moving through a 1.5T magnetic field in a…

A: Given that,  Magnetic field, B=1.5 T

Q: A mass is hanging from the ceiling on a spring and oscillating (forever, and without friction). At…

A: (a) The highest and lowest points of the mass are h=12cm and l=6cm respectively from the floor.…

Q: (a) Determine the cross product of the two vectors, AXB (b) Determine the dot product of the two…

A:

Q: 2.What is Va-Vb for a one turn coil with a uniform Magnetic Field (B) and a radius of 50cm. N-1…

A:

Q: After washing lettuce, you can dry the water from it using a salad spinner. You put the lettuce in…

A: Due to the centrifugal force, the spinning water will be driven outwards to the surface of the bowl.

Q: 27. A 48 kg student runs down the sidewalk and jumps with a horizontal speed of 3.8 m/s onto a…

A:

Q: A circular conducting loop with radius 0.2 meters carries a current of 10 A and is oriented such…

A:

Q: 27) Which of the objects described below is in dynamic equilibrium?: * A) A 100 kg barbell is held…

A: 27)Dynamic equilibrium means that object should be in motion and net force on the object should be…

Q: The potential in a region between x = 0 and x = 6.00 m is V = a + bx, where a = 16.8 V and b = -4.90…

A: The potential in a region between x = 0 and x = 6.00 m is  V = a + bxa = 16.8 V and b = -4.90 V/m

Q: On a hot 98° F day you are driving EAST at 20 mph when you hear a fire engine approaching from…

A: