Atrebuchet was a hurling machine built to attack the walls of a castle under siege. a large stone could be hurled against a wall to break apart the wall. the machine was not placed near the wall because then arrows could reach it from the castle wall. instead, it was positioned so that the stone hit the wall during the second half of its flight. suppose a stone is launched with a speed of v0 = 25.0 m/s and at an angle of θ0 = 41.0°. what is the speed of the stone if it hits the wall (a) just as it reaches the top of its parabolic path and (b) when it has descended to half that height? (c) as a percentage, how much faster is it moving in part (b) than in part (a)?
Answers: 3
Physics, 22.06.2019 11:00, natalieburnett82
Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.
Answers: 3
Physics, 22.06.2019 17:00, griffinkiley22
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 = ?
Answers: 2
Atrebuchet was a hurling machine built to attack the walls of a castle under siege. a large stone co...
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