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Get college assignment help at uniessay writers A rifle is aimed horizontally at a target 59m away. The bullet hits the target 2.0 cm below the aim point.What was the bullet’s flight time?

A 9300 KG boxcar traveling at 15 m/s strikes a second box car at rest. The two stick together and move off with a speed of 6 m/s. What is the mass of the second car?

Two balls, of masses = 49 and = 61 , are suspended . The lighter ball is pulled away to a 66 angle with the vertical and released. Assume that the positive axis is directed to the right.

Two friends, Al and Jo, have a combined mass of 142 kg. At an ice skating rink they stand close together on skates, at rest and facing each other, with a compressed spring between them. The spring is kept from pushing them apart, because they are holding each other. When they release their arms, Al moves off in one direction at a speed of 0.689 m/s, while Jo moves off in the opposite direction at a speed of 1.10 m/s. Assuming that friction is negligible, find Al’s mas

Light from a He-Ne laser (λ = 632.8 nm) strikes a pair of slits at normal incidence, forming a double-slit interference pattern on a screen located 1.72 m from the slits. Figure 28-34 shows the interference pattern observed on the screen. What is the slit separation?

A 480 N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal, 6.00-m-long, uniform, 120-N rod as indicated in the figure below. The left end the rod is supported by a hinge and the right end is supported by a thin cable making a 30.0° angle with the vertical. (a) Find the tension, T, in the cable. 1Your answer is incorrect. Your response differs from the correct answer by more than 10%. Double check your calculations. N (b) Find the horizontal and vertical components of force exerted on the left end of the rod by the hinge. (Take up and to the right to be the positive directions.) horizontal component 2 N vertical component 3 N

A hollow cylinder of mass 0.140 kg and radius 3.80 cm has a string wrapped several times around it. A string is attached to a rigid support and the cylinder allowed to drop from rest. (a) Find the acceleration of the cylinder. aCylinder = 5 m/s2 (b) Find the speed of the cylinder when a meter of string has unwound off of it. v|Cylinder| = 6 m/s

1. Rotating Cylinder I. A massless string is wrapped around the axle of a uniform, solid cylinder of mass m, radius r, and moment ICM = 1/2 mr2 about the center of mass. The axle is massless and has radius r/3. A tension force F < mg is applied to the string, causing the cylinder to roll without slipping as shown in the figure below. Note that in going from (a) to (c) the friction force f reverses direction. i) In figure (a), calculate the magnitude of the friction force f as a fraction of the pulling force F. ii) In figure (c), calculate the magnitude of the friction force f as a fraction of the pulling force F. iii) In figure (b), at what angle θ does the friction force equal zero? 2. Rotating Cylinder II. Now, let’s continue to pull on the cylinder as shown in the figure below. Note that in going from (a) to (c) the acceleration of the center of mass (CM) reverses direction. i) In figure (a), calculate the acceleration of the CM as a fraction of F/m. ii) In figure (c), calculate the acceleration of the CM as a fraction of F/m. iii) In figure (b), at what angle θ does the acceleration of the CM equal zero?

A child exerts a tangential 41.4 {N} force on the rim of a disk-shaped merry-go-round with a radius of 2.50 {m}.If the merry-go-round starts at rest and acquires an angular speed of 0.0806 {rev/s} in 4.00 {s}, what is its mass?

A 2.2 block of wood sits on a table. A 3.0 bullet, fired horizontally at a speed of 500 , goes completely through the block, emerging at a speed of 250 .

Get college assignment help at uniessay writers The following charges are located inside a submarine: 5.00 µC, -9.00 µC, 27.0 µC, and -62.0 µC. (a) Calculate the net electric flux through the hull of the submarine. (b) Is the number of electric field lines leaving the submarine greater than, equal to, or less than the number entering it?

A rifle with a barrel length of 61 cm fires a 12 g bullet with a horizontal speed of 440 m/s. The bullet strikes a block of wood and penetrates to a depth of 12 cm.

You have a mass of 87 kg and are on a 50-degree slope hanging on to a cord with a breaking strength of 221 newtons. What must be the coefficient of static friction to 2 decimal places between you and the surface for you to be saved from the fire?

a .4 kg bead slides on a curved frictionless wire starting from rest at point A. At point B the bead collides elastically with a .6 kg bead at rest. find the distance the bead moves up the wire

Coils rotating in a magnetic field are often used to measure unknown magnetic fields. As an example, consider a coil of diameter 2.00 cm with 72.0 turns that is rotated about an axis perpendicular to the field at a rate of 20.0 Hz. If the maximum induced emf in the coil is 6.00 V, find the strength of the magnetic field.

A 12.8 g bullet is fired horizontally into a 102 g wooden block initially at rest on a horizontal surface. After impact, the block slides 7.5 m before coming to rest. If the coefficient of kinetic friction between block and surface is 0.650, what was the speed of the bullet immediately before impact?

Halley’s Comet orbits the sun about every 75 years due to the gravitational force the sun provides. Compare the gravitational force between Halley’s Comet and the sun when the comet is at aphelion (its greatest distance from the sun) and d is about 4.5 X 10^10m to the force at perhilion (or closet approach), where d is about 5 X 10^10m.

Part B: What would be the field strength at a point 4.8cm directly above or below the center of the coil?

Find the magnitude of the magnetic field (perpendicular to E ) needed so the beam passes undeflected through the plates.

A 29.0 kg child on a 3.00 m long swing is released from rest when the ropes of the swing make an angle of 32.0° with the vertical. (a) Neglecting friction, find the child’s speed at the lowest position. 1ans.: 2.99 m/s (b) If the speed of the child at the lowest position is 2.60 m/s, what is the mechanical energy lost due to friction? 2ans.: 31.5 J

Part b: What is its kinetic energy?

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November 3, 2019