Amass weighing 16 pounds stretches a spring 6 inches and another spring 2 inches. the two springs are then attached in parallel to a common rigid support. find the equation of motion if the mass is initially released from the equilibrium position with a downward velocity of 2 ft/s.

Chemical energy is a form of energy. a. heat b. kinetic c. potential d. electromagnetic

Atorque acting on an object tends to produce a. equilibrium b. rotation c. linear motion d. velocity e. a center of gravity

69. air frictionthe velocity of the satellitea. decreases b. increases c. sometimes increases sometimedecreases d. no effect at all70. the unit of gravitational potential energy isa.jouté b.watt c. newtond.pascal71. which of the following is not influenced by a magneta. cobalt b.copper c.irond. nickel72. one joule of work done in one second by unit positive chargea.1 watt b.1 volt c.1 js d. none73. the most deviated colour of light after passing through a prisea. violet b.red c. green d.yellow4. a coin is placed below a beaker fill with water upto 12 cm isdisplaced by water isa. 9cm b.6cmс.3cmd.7cm