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Get college assignment help at uniessay writers Standing at a crosswalk, you hear a frequency of 560 Hz from the siren on an approaching police car. After the police car passes, the observed frequency of the siren is 480 Hz. Determine the car’s speed from these observations.

The mass of a roller-coaster car, including its passengers, is 502 kg. Its speed at the bottom of the track is 20 m/s. The radius of this section of the track is r1 = 27 m. Find the force that a seat in the roller-coaster car exerts on a 51-kg passenger at the lowest point.

A 220 g, 20.0-cm-diameter plastic disk is spun on an axle through its center by an electric motor.What torque must the motor supply to take the disk from 0 to 1800 rpm in 4.10 s?

A gymnast of mass 66.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity. 1)Calculate the tension in the rope if the gymnast hangs motionless on the rope. 2Calculate the tension in the rope if the gymnast climbs the rope at a constant rate. 3)Calculate the tension in the rope if the gymnast climbs up the rope with an upward acceleration of magnitude 1.40 m/s^2. 4)Calculate the tension in the rope if the gymnast slides down the rope with a downward acceleration of magnitude 1.40 m/s^2 .

The roller-coaster car shown in Fig. 6-41 (h1 = 30 m, h2 = 16 m, h3 = 29 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

When you consider the electromagnetic spectrum containing visible light and X-rays, both are emitted from A. the positive atomic nucleus B. electrons around the atom

Lillian (mass 32.0 kg) standing on slippery ice catches her leaping dog (mass 15 kg) moving horizontally at 2.0 m/s. What is the speed of Lillian and her dog after the catch?

a 3.75 kg object is attached to a vertical rod by two strings as in the figure below. the object rotates in a horizontal circle at constant seped 7.20 m/s

A floodlight with a mass of 36 kg is used to illuminate the parking lot in front of a library. The floodlight is supported at the end of a horizontal beam that is hinged to a vertical pole, as shown. A cable that makes an angle of 13◦ with the beam is attached to the pole to help support the floodlight. Assume the mass of the beam is negligible when compared with the mass of the floodlight. Find the force FT provided by the cable. The acceleration of gravity is 9.81 m/s2 . Answer in units of N.

Given the angle theta_min, what is the maximum weight (or load) W_L,max that this crane can lift without tipping forward? (Recall that weight has units of force.) Express the maximum load in terms of theta_min and other quanitites given in the problem introduction.

Get college assignment help at uniessay writers An electron gun inside a computer monitor sends an electron toward the screen at a speed of 1.20 × 108 m/s. If the mass of the electron is 9.109 × 10–31 kg, what is the magnitude of its relativistic momentum?

A 80-kg astronaut and a 1400-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.20 m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle. What was the initial distance from the shuttle to the astronaut

Question: “A transparent spherical balloon 10 inches in diameter has writing on it. A letter “A” is one inch tall on the balloon. Describe in detail the image of the “A” you would see as you look into the balloon with “A” facing you.

A metallic particle is subjected to the influence of a magnetic field such that it travels downward through a fluid that extends from plate A to plate B. If the particle is released from rest at the midpoint C, s=100mm, and the acceleration is measured as a= (4s) m/s2 , where s is in meters, determine the velocity of the particle when it reaches plate B, s=200mm, and the time it needs to travel C to B.

A ball with a radius of 6 cm and a mass of 1850 g is thrown into a lake. Will the ball sink or flOAT?

A wooden rod of negligible mass and length 79.0 cm is pivoted about a horizontal axis through its center. A white rat with mass 0.490 kg clings to one end of the stick, and a mouse with mass 0.250 kg clings to the other end. The system is released from rest with the rod horizontal. If the animals can manage to hold on, what are their speeds as the rod swings through a vertical position?

In Fig. 6.7, two masses, each 24 kg, are at rest and connected as shown. The coefficient of kinetic friction between the inclined surface and the mass is 0.31. Find the speed of the masses after they have moved 1.6 m.Please provide step-by-step method for solving the problem.Attached is the figure.

A stone is thrown directly upward at 15.0 m/s from ground level and feels no appreciable air resistance. Use the work-energy theorem to find how high it will be when its speed has been reduced to half of its initial value. Please provide step-by-step process. Thank you.

A loudspeaker of mass 23.0 is suspended a distance of = 2.00 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.30 .

A 7.0-kg rock is subject to a variable force given by the equation F(x) = 6.0 N – (2.0 N/m)x (6.0N/m2)x2. If the rock initially is at rest at the origin, find its speed when it has moved 9.0 m.Please provide step-by-step method to solving this problem. Thank you.

A race car has a mass of 701 kg. It starts from rest and travels 41 m in 3.3 s. The car is uniformly accelerated during the entire time. What net force is applied to it?

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November 3, 2019