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A car driver has rear ended a truck but claims he was driving the speed limit before hitting the brakes. The driver left a 50m long streak of tire rubber when he slammed on the brakes. The mass of the drivers car is 1000kg. The coefficient of friction between the tire and asphalt is 0.5. The mass of the truck that got hit is 5000kg. The speed limit for the road is 40mph. What was the magnitude of the acceleration of the car? (Remember that magnitudes are always positive). How fast was the car going right before the driver slammed on the brakes?
A 47-kg bungee jumper has fallen far enough that her bungee cord is beginning to stretch and resist her downward motion. Find the force (magnitude and direction) exerted on her by the bungee cord
a thin lens of focal length 30.0 cm and is used to form an image that is twice the size of the object. Find the object position
question a 6 microc charge is found to move against a 9 kv potential difference. if the charge moves along an electric
When the flask and mercury are warmed together to a temperature of 52.0 degrees C , a volume of 8.35cm3 of mercury overflows the flask.If the coefficient of volume expansion of mercury is 1.8 * 10^-4 /K ,
question a 0.344 kg mass is attached to a spring and undergoes simple harmonic motion with a period of 0.95 s. the
A coordinate system is chosen such that the sheets lie in the yz-plane, with sheet A at x = 0. A graph of the electric field as a function of x is shown at right below. Find the charge σB (sign and magnitude) of sheet B in terms of charge density ..
an airplane diving at an angle of 54deg with the vertical releases a projectile at an altitude of 770 m. the projectile
The position of an object connected to a spring varies with time according to the expression x = (5.4 cm) sin(9.3?t). Find the frequency of the motion
A displacement vector at an angle of 150 degrees (counter clockwise) from the x axis has a y component equal to 123 meters
A small glass bead charged to 7.4nC is 4.0cm from a thin, uniformly charged, 10--cm long glass rod. The bead is repelled from the rod with a force of 900*10^-6N . What is the total charge |Q| on the rod
Given mass of skier 70kg, initial speed of 12.0m/s, friction coefficient of 0.74, time of 30s, angle is 30 above horizontal how long is the ski trail
A cubic box of volume 4.2 multiplied by 10-2 m3 is filled with air at atmospheric pressure at 20°C. What is the net force on each side of the box
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