a block of mass 2 kg slides along a horizontal tabletop. a horizontal applied force of 12 n and a vertical applied force of 15 n act on the block, as shown above. if the coefficient of kinetic friction between the block and the table is 0.2, the frictional force exerted on the block is most nearly

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .