Alarge crate with mass m rests on a horizontal floor. the static and kinetic coefficients of friction between the crate and the floor are μs and μk, respectively. a woman pushes downward on the crate at an angle θ below the horizontal with a force f⃗ .
a)what is the magnitude of the force vector f⃗ required to keep the crate moving at constant velocity?
express your answer in terms of m, g, θ, and μk.
b)if μs is greater than some critical value, the woman cannot start the crate moving no matter how hard she pushes. calculate this critical value of μs.
express your answer in terms of θ.
Answers: 3
Physics, 22.06.2019 03:00
The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.
Answers: 2
Physics, 22.06.2019 18:30
Abaseball is thrown from the outfield toward the catcher. when the ball reaches its highest point, which statement is true? (a)its velocity is not zero, but its acceleration is zero. (b) its velocity and its acceleration are both zero. (c) its velocity is perpendicular to its acceleration. (d) its acceleration depends on the angle at which the ball was thrown. (e) none of the above statements are true.
Answers: 1
Alarge crate with mass m rests on a horizontal floor. the static and kinetic coefficients of frictio...
Social Studies, 04.12.2020 14:00
Biology, 04.12.2020 14:00
Mathematics, 04.12.2020 14:00
Mathematics, 04.12.2020 14:00
Mathematics, 04.12.2020 14:00
History, 04.12.2020 14:00
Health, 04.12.2020 14:00
Social Studies, 04.12.2020 14:00
English, 04.12.2020 14:00
English, 04.12.2020 14:00