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At an accident scene on a level road, investigators measure a car's skid mark to be 73 m long. It was a rainy day and the coefficient of friction was estimated to be 0.46. Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes.
Why does the car's mass not matter?
Sound with a frequency 730 Hz from a distant source passes through a doorway 1.05 m wide in a sound-absorbing wall. Find the number of the diffraction minima at listening positions along a line parallel to the wall
Find the force necessary to start the crate moving, given that the mass of the crate is 32 {rm kg} and the coefficient of static friction between crate and floor is 0.60.
A weight lifter lifts a 350 N set of weights from ground level to a position over his head, a vertical distance of 2.00 m. How much work does the weight lifter do, assuming he moves the weights at constant speed
At the upper wire what is the direction of the B field caused by the lower wire?
A 50 kg steel file cabinet is in the back of a dump truck. The truck's bed, also made of steel, is slowly tilted. What is the size of the static friction force on the cabinet
Through a particular process, the pressure of the gas in a heat engine increases from 1.15×105 Pa to 2.37×105 Pa, while the volume increases from 2.33×102 m3 to 2.89×102 m3. The pressure-volume graph is a straight line.
0.5m side wooden cube floats on the lake surface with 2/3 of the cube submerged under the water. calculate the minimum work down on the cube that would sink it?
Just before impact the audience hears a frequency of 1.15 × f0. What was the singer's terminal velocity, if the speed of sound is 330-m/s?
A driver in a car travelling at the speed of 78 km/h sees a cat km away on the road. How long will it take for the car to accelerate uniformly to a stop in exactly 99 m.
A 1442 kg car is traveling south, and a 2028 kg van is traveling west. what is the speed of each vehicle
the electric field between the plates of a paper-separated k 3.75 capacitor is 8.24times104 vm. the plates are 1.80 mm
A 2.0-m-long, 22-kg ladder is resting against a house wall, making a 32 angle with the vertical wall. The coefficient of static friction between the top of the ladder and the wall the coefficient is 0.00. Determine the minimal coefficient of stati..
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