Physics, 30.07.2019 04:20, trinitieu66
An 80-kg quarterback jumps straight up in the air right before throwing a 0.43-kg football horizontally at 15 m/s . how fast will he be moving backward just after releasing the ball? modelthe interaction at study in this problem is the action of throwing the ball, performed by the quarterback while being off the ground. to apply conservation of momentum to this interaction, you will need to clearly define a system that is isolated or within which the impulse approximation can be applied. which of the following best describes why you can analyze the interaction described in this problem using conservation of momentum? a. the throwing action is quick enough that external forces may be ignored. b. there are no external forces acting on the system. c. external forces don't act on the system during the jump. d. conservation of momentum is always the best way to analyze motion.
Answers: 3
Physics, 22.06.2019 04:30, elizabethseoane1829
You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at β20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?
Answers: 2
Physics, 22.06.2019 05:40, thomasalmo2014
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Physics, 22.06.2019 07:20, MannyBanko1350
If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =
Answers: 1
An 80-kg quarterback jumps straight up in the air right before throwing a 0.43-kg football horizonta...
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