Physics, 09.07.2019 01:00 zackcarlson9374
When an object is dropped from the top of a tall cliff, your teacher tells you to use -10 m/s2 for the approximate acceleration due to gravity. what sign should the displacement of the object have and why? a) the displacement should be positive, because it only moves in one direction. b) the displacement should be positive, because this choice would make calculations easier c) the displacement should be negative, because the negative represent a downward direction. d) the displacement should be positive, because you can never have less than zero displacement. the truck is described as travelling at 30mph to the west. the quantity described here is a(n) a) speed b) velocity c) acceleration d) kinetic energy
Answers: 2
Physics, 22.06.2019 00:50, gungamer720
Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?
Answers: 1
Physics, 23.06.2019 00:00, pchisholm100
You are standing on a boat. which of the following strategies will make the boat start moving? a. pushing the mast b. throwing some cargo out of the boat c. pushing the front ofthe boat d. pushing another passenger
Answers: 3
When an object is dropped from the top of a tall cliff, your teacher tells you to use -10 m/s2 for t...
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