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Get college assignment help at uniessay writers The roller-coaster car shown in Fig. 6-41 (h1 = 35 m, h2 = 11 m, h3 = 22 m), is dragged up to point 1 where it is released from rest. Assuming no friction, calculate the speed at points 2, 3, and 4.

In the figure, two point charges, = 50.0 and = -79.0 , are separated by 0.500 . A third charge of 92.0 is placed at the point , 0.18 to the left of . Find the work needed to move the third charge to point , 0.40 to the left of

A 66.0 kg person throws a 0.0410 kg snowball forward with a ground speed of 25.0 m/s. A second person, with a mass of 57.0 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.20 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice.

A rectangle measuring 30.0 {rm cm} by 40.0 {rm cm} is located inside a region of a spatially uniform magnetic field of 1.30 T, with the field perpendicular to the plane of the coil (the figure ). The coil is pulled out at a steady rate of 2.00 {rm{ cm/s}} traveling perpendicular to the field lines. The region of the field ends abruptly as shown. Find the emf induced in this coil when it is all inside the field.

A layer of oil (n = 1.45) floats on an unknown liquid. A ray of light shines from the oil into the unknown liquid. The angles of incidence and refraction are, respectively, 65.0° and 58.0°. What is the index of refraction of the unknown liquid?

A Young’s double-slit experiment is performed using light that has a wavelength of 635 nm. The separation between the slits is 4.5 10-5 m. Find the angles that locate the (a) first-order, ° (b) second-order, and ° (c) third-order bright fringes on the screen. °

a light inextensible string passes over a smooth fixed pully.two masses m1=0.4kg,m2=0.6kg are suspended from one end of the string.a third mass m3=0.9kg is suspended from the other end of the string . initially all three masses are at the same height.the system is released from rest. a. calculate initial accelerations of the masses and state their directions B. calculate the tension in the string After 0.5s, m1 becomes detached and falls to the ground. c.What are the new accelerations of m1,m2,and m3? d.what is the new tension in the string? e. what is the maximum height of m3 above its stating position? f. how long does it takes before m2 and m3 return to their starting positions?

A 40.0 rock slides on a rough horizontal surface at 8.50 and eventually stops due to friction. The coefficient of kinetic friction between the rock and the surface is 0.300. What average thermal power is produced as the rock stops?

If a person can jump a horizontal distance of 2.7 m on Earth, how far could the person jump on the moon, where the free-fall acceleration is g/6 and g = 9.81 m/s2? .. in meters How far could the person jump on Mars, where the acceleration due to gravity is 0.38 g? in meters

A wrecking ball (weight 4800 N) is supported by a boom, which may be assumed to be uniform and has a weight of 3600 N. As the drawing shows, a support cable runs from the top of the boom to the tractor. The angle between the support cable and the horizontal is 32 degrees, and the angle between the boom and the horizontal is 48 degrees. Find the tension in the support cable and find the magnitude of the force exerted on the lower end of the boom by the hinge.

Get college assignment help at uniessay writers 20.6c:What would be the value of the average induced emf if the field decrease was twice as much and it also took twice as long to change?

20.2c:What is the flux through the loop’s plane if it is perpendicular to the field?

A scaffold of mass 80 kg and length 5.1 m is supported in a horizontal position by a vertical cable at each end. A window washer of mass 72 kg stands at a point 2.0 m from one end. What is the tension in (a) the nearer (relative to the person) cable and (b) the farther (relative to the person) cable?

A dog sits 1.53 m from the center of a merry-go-round with a angular speed of 1.65 rad/s. If the magnitude of the force that maintains the dog’s circular motion is 38.0 N, what is the dog’s mass?

A proud deep-sea fisherman hangs a 65.6 fish from an ideal spring having negligible mass. The fish stretches the spring 0.123 .

A roller-coaster car may be represented by a block of mass 50.0 kg. The car is released from rest at a height h = 57.0 m above the ground and slides along a frictionless track. The car encounters a loop of radius R = 19.0 m at ground level, as shown. As you will learn in the course of this problem, the initial height 57.0 m is great enough so that the car never loses contact with the track.

A m1 = 16.0 kg object and a m2 = 11.5 kg object are suspended, joined by a cord that passes over a pulley with a radius of 10.0 cm and a mass of 3.00 kg (as shown). The cord has a negligible mass and does not slip on the pulley. The pulley rotates on its axis without friction. The objects start from rest 3.00 m apart. Treating the pulley as a uniform disk,determine the speeds of the two objects as they pass each other.

A spherical steel ball bearing has a diameter of 2.540 cm at 26°C. (The average coefficient of linear expansion for steel is 1.1 x 10^-5 (°C)^-1.) (a) What is the diameter when its temperature is raised to 113°C?

A 40 kg skier skis directly down a frictionless slope angled at 10° to the horizontal. Assume the skier moves in the negative direction of an x axis along the slope. A wind force with component F, acts on the skier. What is F, if the magnitude of the skier’s velocity is

A cylinder is rolling along the ground without the slippingat 7m/s. It comes to a hill and begins going up. Assuming no losses to friciton, how high vertically will it go before it stops?

A 3.83kg object is swung in a vertical circular path on a string 6.19 m long. the acceleration of gravity is 9.8m/s^2. If the speed at the top of the circle is 8.4 m/s, what is the tension in the string when the object is at the top of the circle? Answer in units of N.

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November 3, 2019