Physics, 06.11.2019 23:31, xcrysttallx
You are testing a new roller coaster ride in which a car of mass m moves around a vertical circle of radius r. in one test, the car starts at the bottom of the circle (point a) with initial kinetic energy ki. when the car reaches the top of the circle (point b), its kinetic energy is ki/4, and its gravitational potential energy has increased by ki/2. how much work was done on the car by the force of friction as it moved from point a to point b, in terms of m, g and r? what was the magnitude of the friction force (assumed to be constant throughout the motion), in terms of m and g?
Answers: 1
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 17:30, Mariaisagon8446
Heterogeneous mixture with larger particles that never settle is
Answers: 2
Physics, 23.06.2019 01:30, kaylaamberd
The ideal gas model is valid if which of the following conditions is true? the gas density is low. the gas density is high. the temperature is low. the temperature is high. the gas density and the temperature are low. the gas density and the temperature are high. the gas density is high and the temperature is low. the gas density is low and the temperature is high.
Answers: 3
You are testing a new roller coaster ride in which a car of mass m moves around a vertical circle of...
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