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A 2000kg car starts from rest at the top of a 5.00m longdriveway that is sloped at an angle of 20 degrees with thehorizontal. An average force of friction of 4000N impedes themotion of the car. Using mechanical energy methods find the speedof the car at the bottom of the driveway.
a motor scooter trsvels east at a speed of 12 m/s. The driverthen reserves direction and heads west at 15 m/s. What is the change in velocity of the scooter? (answer in magnitude anddirection)
Two point charges q1 = 3.40 nC and q2 = -5.50 nC are 0.100m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2. Take an electric potential to be zero at infinity.
A cylindrical copper cable carries a current of 1100 A. There is a potential difference of 1.6 multiplied by 10-2 V between two points, What is the radius of the cable
The max wavelength of light, which emits electrons is 460 nm. Calculate work function of sodium
A current with sinusoidal time-dependence, whose peak value is 9.55 A and frequency is 255 cycles per second, Calculate the average power dissipated by the loop
After 6.00 kg of water at 77.3 oC is mixed in a perfect thermos with 3.00 kg of ice at 0.0 oC, the mixture is allowed to reach equilibrium. find the change in entropy that occurs
During a particular thunderstorm, the electric potential difference between a cloud and the ground is Vcloud - Vground = 4.10 108 V, What is the change in an electron's electric potential energy
A flywheel in a motor is spinning at 560 when a power failure suddenly occurs. The flywheel has mass 40.0 and diameter 75.0. The power is off for 34.0, and during this time the flywheel slows down uniformly due to friction in its axle bearings. Durin..
Use the worked example above to help you solve this problem. A tortoise and rabbit engage in a footrace over a distance of 3.70 km. The rabbit runs 0.400 km, then stops for a 83.0-min nap. Upon awakening, he remembers the race, and runs twice a..
An object at rest explodes into three peices of equal mass. One moves east at 20 m/s; What is the velocity of the third piece
The man hears the sound of the splash 2.8 s after he releases the rock from rest. The speed of sound in air (at the ambient temperature) is 336 m/s. How far below the top of the well is the surface of the water
A stone is thrown into the air with an initial velocity of 50 m/s at 37degress to the horizontal, find the total horizontal distance it travels
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