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Q. A 1500-kg car moving east at 26 m/s collides with a 1720-kg car moving south at 15 m/s and the two cars stick together.
What is the velocity of the cars right after the collision?
Q. Traveling at a speed of 16.1 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.720. What is the speed of the automobile after 1.30 s have elapsed? Ignore the effects of air resistance.
What is lemmings kinetic energy
A 73 kg parachutist descends during a vertical height of 420 m with constant speed. Find the increase in entropy produced by the parachutist; assume the air temperature is 21°C.
The heat of vaporization of ethyl alcohol is about 200 cal/g. If 2.3 kg of it were allowed to vaporize in a refrigerator, how many grams of ice will be formed from 0°C water.
Drawing on Eratoshthenes' method, if two observers are due north and south of each other and are separated by 400 km, what is circumference of their spherical world if they see the similar star on their meridian at altitudes of 23degrees and 47deg..
Standing at a crosswalk, you hear a frequency of 520 Hz from the siren of an approaching police car. After the police car passes, observed frequency of the siren is 455 Hz. Establish the car's speeds from these observations.
The magnitude of q is chosen to make the potential difference between spheres 430 V, with the inner sphere at higher potential. Compute q.
A hollow aluminium cylinder is to be fitted over a steel piston. At 22°C the inside diameter of the cylinder is 99.2 percent of the outside diameter of the piston. To what common temperature must the two pieces be heated in order that the cylinder ju..
A 250 kg weather rocket is loaded with 100kg of fuel and fired straight up. It accelerates upward at 32m/s2 for 34 s, then runs out of fuel. overlook any air resistance effects.
The specific heat of ice to is 2100 and the heat of fusion for ice is . How much time passes before ice starts to melt? From the time while the heating begins, how much time does it take before the temperature begins to rise above 0.
A 5.20 g pop up toy is compressed 1.50 cm and pops up to the height of 50 cm the spring constant is 270 Nm. What is the loss of energy.
A rifle fires a 2.39 10-2-kg pellet straight upward, since the pellet rests on a compressed spring that is released when the trigger is pulled. The spring has a negligible mass and is compressed by 9.17 10-2 m from its unstrained length. The pellet r..
The bullet penetrates into the block and stops due to its friction with the block. The compound system of the block plus the bullet rises to a height of 11 cm along a circular arc with a 20 cm radius A bullet with a m1 = 30.0 g mass is fired horizont..
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