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Question1
A softball, of mass m = 0.195 kg, is pitched at a speed v0 = 27.3 m/s. Due to air resistance, by time it reaches home plate it has slowed by 10.1 percent. The distance between plate and pitcher is d = 13.1 m. compute the average force of air resistance, Fair, that is exerted on the ball during its movement from pitcher to the plate.
Question2
A policeman investigating an accident measures skid marks left by a car. He determines that distance between the point that the driver slammed on the brakes and the point where a car came to a stop was 28.0 m. From a reference manual he determines that coefficient of kinetic friction between the tires and the road under the prevailing conditions was 0.300. How fast was car going when the driver apply the brakes?
A cars brakes can only accelerate the car by -10m/s^2. If the car is going 30m/s when the brakes are applied, how long would it take for the car to come to a stop.
A bicycle is turned upsdie down and has one wheel spinning at 95.0 rpm. The wheel slows uniformly to a stop in 45.0 seconds. What is the angular distance (in rad) traveled during this time
An engineer has designed a machine to produce electricity by using the difference in the temperature of ocean water at different depths. what is the maximum efficiency of this machine
A small airplane flies with a speed relative to the ground (ground speed) of 212.0 km/h in a direction 19.0 degrees to the east of north. what is the speed of the wind
A submarine is located 2.000 km below the surface of the water. What is the absolute pressure of the seawater on the outside of the submarine
A rifle with a barrel length of 58 fires an 11 bullet with a horizontal speed of 370. The bullet strikes a block of wood and penetrates to a depth of 15.
Beginning with expressions for the reactance of a capacitor and an inductor, derive an expression for the resonant frequency
A Carnot engine takes an amount of heat QH = 111 J from a high-temperature reservoir at temperature TH = 1030 °C, Find the amount of work that is obtained from this process
As the block has raised a vertical height of 0.725, the tension in the cord is 4.66 .What is the velocity of the bullet originally.
A uniform electric field of magnitude 395 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. What is the work done by the field on the electron
A 150 g ball and a 250g ball are connected by a 35{rm cm}-long, massless, rigid rod. The balls rotate about their center of mass at 150 rpm.
A 10g ball of clay is thrown horizontally at 30m/s toward a 1.5kg block sitting at rest on a frictionless hi surface. The clayts and sticks to the block. What impulse does the clay exert on the block
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