Aball hits a wall. what is true about the magnitude of the force experienced by the ball compared with the force experienced by the wall?

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?

Karen is running forward at a speed of 9 m/s. she tosses her sweaty headband backward at a speed of 20 m/s. the speed of the headband, to the nearest whole number relative to a stationary observer watching karen