Physics, 15.04.2020 16:59 Anshuman2002
A helicopter lifts a 86 kg astronaut 20 m vertically from the ocean by means of a cable. The acceleration of the astronaut is g/11. How much work is done on the astronaut by
(a) the force from the helicopter and
(b) the gravitational force on her? Just before she reaches the helicopter, what are her
(c) kinetic energy and
(d) speed?
Answers: 1
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Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k
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Two polarizers are oriented at 40∘ to each other and plane-polarized light is incident on them. if only 16 percent of the light gets through both of them, what was the initial polarization direction of the incident light?
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Match these items. 1. coulombs __force 2. ohms __emf 3. centimeters __resistance 4. newtons __charge 5. volts __length
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A helicopter lifts a 86 kg astronaut 20 m vertically from the ocean by means of a cable. The acceler...
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