Suppose you drop a brick from the top of a building that is 250m high. the brick has a mass of 2 kg, and the resistance force fr is given by fr =-40, where u is the velocity in m/s. how long will it take the brick to reach the ground? what is its approximate velocity at that time (use a calculator or computer)? does it reach terminal velocity?

Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential

Asmall object with mass 0.200 kg swings back and forth on the lower end of a light rope that is 3.00 m long. the upper end of the rope is attached to the ceiling. as the object swings through its lowest position, where the rope is vertical, the speed of the object is 5.80 m/s. at this point in the motion, what is the tension in the rope? (use g = 9.80 m/s2.)

Which missing item would complete this alpha decay reaction ? > 228/88ra + 4/2he a.224/96 rn b. 232/90 th c. 230/92 u d. 235/92 u