Maria throws an apple vertically upward from a height of 1.4 m with an initial velocity of +3.1 m/s. will the apple reach a friend in a tree house 4.2 m above the ground? the acceleration due to gravity is 9.81 m/s 2 .

In which of the following is positive work done by a person on a suitcase

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

Which of the following are forms of phase changes a. freezing b. condensation c. heating d. exchanging