Physics, 30.03.2020 21:29 NemoMay7990
A 14.0 m uniform ladder weighing 490 N rests against a frictionless wall. The ladder makes a 55.0°-angle with the horizontal. (a) Find the horizontal and vertical forces (in N) the ground exerts on the base of the ladder when an 810-N firefighter has climbed 3.90 m along the ladder from the bottom. horizontal force magnitude N direction vertical force magnitude N direction (b) If the ladder is just on the verge of slipping when the firefighter is 9.40 m from the bottom, what is the coefficient of static friction between ladder and ground? (c) What If? If oil is spilled on the ground, causing the coefficient of static friction to drop to half the value found in part (b), what is the maximum distance (in m) the firefighter can climb along the ladder from the bottom before the ladder slips? m
Answers: 2
Physics, 22.06.2019 14:30
Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates
Answers: 3
Physics, 22.06.2019 16:30
Select all the correct answers. which three statements about electromagnetic radiation are true?
Answers: 3
Physics, 22.06.2019 17:10
As the distance from a magnet increases, what happens to the magnet force?
Answers: 1
Physics, 23.06.2019 00:00
You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?
Answers: 3
A 14.0 m uniform ladder weighing 490 N rests against a frictionless wall. The ladder makes a 55.0°-a...
English, 17.02.2021 16:40
Mathematics, 17.02.2021 16:40
Biology, 17.02.2021 16:40
French, 17.02.2021 16:40
German, 17.02.2021 16:40
World Languages, 17.02.2021 16:40
History, 17.02.2021 16:40
History, 17.02.2021 16:40
Mathematics, 17.02.2021 16:40