Achair of weight 90.0 n lies atop a horizontal floor; the floor is not frictionless. you push on the chair with a force of f = 38.0 n directed at an angle of 42.0 degrees below the horizontal and the chair slides along the floor.
using newton's laws, calculate n, the magnitude of the normal force that the floor exerts on the chair.

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