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A police officer is investigating the scene of an accident where two cars collided at an intersection. One car with a mass of 1015 kg moving west had collided with a 1300-kg car moving north. The two cars, stuck together, skid at an angle of 30° north of west for a distance of 17 m. The coefficient of kinetic friction between the tires and the road is 0.80. The speed limit for each car was 70 km/h.What was the speed of the lighter car? (km/h)What was the speed of the heavier car? (km/h)Was either car speeding?
A guitar string is 90.0cm long and has a mass of 3.17 g. From the bridge to the support post (=l) is 60.0cm, What are the frequencies of the fundamental and first two overtones
A ball rolls off a table and falls 0.70 m to the floor, landing with a speed of 4.3 m/s. What is the magnitude of the acceleration of the ball just before it strikes the ground
A projectile explodes at the top of its trajectory and breaks into two pieces with one piece having five times the mass of the other. The smaller piece returns to precisely the same point at which the projectile was launched. Where does the bigger pi..
The last stage of a rocket is traveling at a speed of 7200 m/s. This last stage is made up of two parts which are clamped together, What is the speed of the payload
A water heater consisting of a metal coil that is connected across the terminals of a 21.0-V power supply is able to heat 160. What is the resistance of the coil
a heat engine operates between a hot reservoir at 950 degree celcius, what is the maximum possible efficiency
Converging lens with plane mirror box somewhere at the left on central axis of converging lens. What is distance between box and lens
A defensive lineman of mass M = 115 kg makes a flying tackle at vi \= 4.00 m/s on a stationary quarterback of mass m = 76 kg, calculate the shear stress exerted on the bone in the collision.
the distance between the earth and moon (r = 3.84 Ã- 108 m) and Mmoon = 7.36 Ã- 1022kg and Mearth = 5.98 Ã- 1024kg. Calculate the gravitational potential energy of the moon
An inventor claims that he has designed an engine which will produce a power output of 170kW while burning a unique fuel which releases 21,000kJ of heat in a minute. He states the upper and lower temperatures of the engine are 670K and 330K, respecti..
a 15mw energy laser has a beam exit diameter of 2cm and beam divergence of 0.0002radians.anbspnbspcalculate the power
An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.00 m/s on a smooth, slippery surface. What is the speed of the arrow after passing through the target
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