A260 n crate initially at rest on the floor requires an applied f
of slightly more that 79 n to start it moving. draw a free-body diagram showing
all forces acting on the crate. find between the crate and floor.

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below. your friend goes first, and you follow after he has dropped a distance of 2.0m. when your friend hits the water, is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.