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A 0.70 × 103 kg sports car collides into the rear end of a 2.2 × 103 kg SUV stopped at a red light. The bumpers lock, the brakes are locked, and the two cars skid forward 4.2 m before stopping. The police officer, estimating the coefficient of kinetic friction between tires and road to be 0.40, calculates the speed of the sports car at impact. What was that speed?
A 374-kg sailboat has an acceleration of 0.643 m/s2 at an angle of 58.9 ° north of east. find the direction of the net force that acts on the sailboat
A flight attendant pulls her 63-N flight bag a distance of 277-m along a level airport floor at a constant velocity. The force she exerts is 35N at an angle of 57° above the horizontal. Determine the work completed by the force of friction on flig..
The Boeing 777 aircraft has a takeoff mass of 255000kg and a takeoff speed of 115m/s, What airflow speed across the top of the wing is necessary for the plane to fly
A Heliun-Neon laser illuminates a narrow, single slit that is 1850 nm wide. Determine the wavelength of the light from the laser
What is the total force (magnitude and direction) exerted by these two charges on a third charge q3=+5.00 nC located at y=-0.4000m
Liquid nitrogen boils at 77.00 K. Would this experiment needs to be altered if we used water, which boils at 373 K? Why.
The initial height of the ball is 60.0m and has a potential energy and initial pe of 1176.00, What was the maximum speed after it hit bottom
A harmonic wave travels in a wire with amplitude 6.05 mm, wavelength 0.451 m, and frequency 462 Hz. What is speed with which the wave travels.
A mass is attached to a spring stretched 2.5 cm from equilibrium. What is the angular frequency of the oscillation
The crankshaft in a race car goes from rest to 3540{\rm rpm} in 3.0{\rm s}. What is the crankshaft's angular acceleration
A father racing his son has 1/2 the kinetic energy of the son, who has 1/3 the mass of the father, What are the original speeds of (b) the son
A baking dish is removed from a hot oven and placed on a cooling rack. As the dish cools down to 30.0°C from 196°C, What was the net radiant power of the baking dish
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