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The formula can be used to estimate the speed of a car, v, in miles per hour, based on the length, L, in feet, of its skid marks upon sudden braking on a dry asphalt road. If a car is involved in an accident and its skid marks measure 211.25 feet, at what estimated speed was the car traveling when it applied its brakes just prior to the accident?
An auto race is held on a circular track. A car completes onelap in a time of 21.5 seconds, with an average tangential speeed of38.1 m/s. What is the radius of the track
explain what was surprising about the observations and important conslusions derived from blackbody radiation the
A sinusoidal wave traveling in the positive x-direction has an amplitude of 15cm, a wavelength of 40cm, Write down the wave function for a left traveling wave with the same parameters
Betty Bodycheck (mB = 54.7 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 42.4 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Find both Betty's and Sally's Kinetic Energies
when a driver brakes an automobile the friction between the brake drums and the brake shoes converts the cars kinetic
An apartment has a living room whose dimensions are 2.9 m x3.9 m x 6.0 m. what is the mass (in grams) of the air
A Scottish physics professor is fishing in Loch Ness and hooks an ancient gold artifact. The density of gold is 19300 kg/m3 and seawater is 1035 kg/m3. While he is pulling up the treasure, the tension in his fishing line is 120N. What will be the ..
A 40.0 N crate starting at rest slides down a rough 6.0 m longramp inclined at 30.0 degrees with the horizontal. find the velocity of the crate at the bottom of the incline
A sled at rest is suddenly pulled in three horizontal directions at the same time, but it does not move. Paul pulls to the northeast with a force of 32 lb. Johnny pulls at an angle of 37o south of due west with a force of 54 lb. Connie pulls with ..
A home run is hit in such a way that the baseball just clears a wall 14.0 m high, located 118 m from home plate. Find the time it takes the ball to reach the wall
Suppose that after a centrifuge in a medical laboratory is turned off it continues to rotate with a constant angular deceleration for 15.5 s before coming to rest. If its initial angular speed was 3410 rpm, what is the magnitude of its angular dece..
Lonnie pitches a baseball of mass .20 kg. The ball arrives at home plate with a speed of 40 m/s and is batted straight back to Lonnie with a return speed of 60-m/s. If the bat is in contact with the ball for .050 s, what is the impulse experienced..
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