Ablock with mass m= 6.7 is hung from a vertical spring. when the mass hangs in equilibrium, the spring stretches x = 0.29m. while at the equilibrium position, the mass is then given an initial push it downword and v 4.6 m/s. the block oscillates on the spring without friction.
1)what is the spring constant of the spring? 2)what is the oscillation frequency? 3)after t = 0.42 s what is the speed of the block? 4)what is the magnitude of the maximum acceleration of the block? 5)at t = 0.42 s what is the magnitude of the net force on the block?

You have been called to testify as an expert witness in a trial involving a head-on collision. car a weighs 1515 lb and was traveling eastward. car b weighs 1125 lb and was traveling westward at 44.0 mph. the cars locked bumpers and slid eastward with their wheels locked for 22.5 ft before stopping. you have measured the coefficient of kinetic friction between the tires and the pavement to be 0.750 . how fast (in miles per hour) was car a traveling just before the collision? (this problem uses english units because they would be used in a u.s. legal proceeding.)

Gunpowder residue is most likely to show up where on a shooters hands

** urgent** the voltage across the primary winding is 350,000 v, and the voltage across the secondary winding is 17,500 v. if the secondary winding has 600 coils, how many coils are in the primary winding? a- 30 coilsb- 583 coilsc- 12,000 coilsd- 332,500 coils