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a. An 840 kg car needs to round a level curve with a radius of 23m.The driver wants to proceed at 56 kph. How much total friction force is needed between the tires and the pavement to keep the car on the road.Use RISERS,in other words, sketch and equate.
b. How much work does the friction force do on the car?
a runner of the 100m dash aims to achieve a 10sec time. he accelerates to his final cruising speed in the first 10m. what is his final cruising speed
To make a simple microscope a student places two converging lenses of +20 D at opposite ends of a 34 cm long tube. What is the tube length of the microscope
A spring has an unstretched length of 12cm. When an 80 g ball is hung from it, the length increases by 4.0 cm.Then the ball is pulled down another 4.0 cm and released. a) What is the spring constant? b) What is the period of the oscillation?
A uniform board is leaning against a smooth vertical wall. The board is at an angle (theta) above the horizontal ground. Find the smallest value for the angle (theta), such that the lower end of the board does not slide along the ground.
A large wooden turntable in the shape of the flat disk has a radius of 2.00 {rm m} and a total mass of 120 {rm kg}. The turntable is initially rotating at 3 {rm rad}/{rm s} about a vertical axis through its center.
A motorist drives north for 35 minutes at 85 km/h and then stops for 15.0 minutes. He then continues north, traveling an additional 130 km in 2 h.
A certain EM wave has a wavelength of 4e-7 m and a speed of 2.5e8 m/s in a particular material (not a vacuum). What is the wavelength of this wave in a vacuum
A U-shaped tube open to the air at both ends contains some mercury. Calculate the vertical distance h from the top of the mercury in the right-hand arm of the tube to the top of the water in the left-hand arm
Suppose the temperature of 4.72 L of ideal gas drops from 351 K to 275 K. (a) If the volume remains constant and the initial pressure is atmospheric pressure, Find the number of moles of gas
A vertical scale on a spring balance reads from 0 to 225. The scale has the length of 11.5 from the 0 to 225 reading. A fish hanging from the bottom of the spring oscillates perpendicularly at a frequency of 3. Ignore the mass of the spring, what ..
The average power dissipated in a 47-? resistor is 2.5 W. What is the peak value I0 of the ac current in the resistor
While eating lunch with friends Diana spots her boyfriend having lunch, and having a good time with, How fast must Diana through the apple so that it hits her boyfriend
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