Physics, 10.10.2019 05:00 Knownothing
Consider a railroad bridge over a highway. a train passing over the bridge dislodges a loose bolt from the bridge, which proceeds to fall straight down and ends up breaking the windshield of a car passing under the bridge. the car was 39 m away from the point of impact when the bolt began to fall down; unfortunately, the driver did not notice it and proceeded at constant speed of 19 m/s. how high is the bridge? or more precisely, how high are the railroad tracks above the windshield height? the acceleration due to gravity is 9.8 m/s 2 .
Answers: 3
Physics, 22.06.2019 00:00
True or false: the revolution of the earth creates day and night as it rotates around the sun
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Physics, 22.06.2019 02:30
The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?
Answers: 3
Physics, 23.06.2019 02:50
Orque can be calculated by multiplying the force (n) applied at 90∘ to the lever arm at a distance (m) from the pivot point (point of rotation), the compound si unit for the torque is n⋅m. if the force (at 90∘ to the lever arm) applied is 15 n and it is applied at 2.0 m from the pivot point (point of rotation), what is the torque on the lever?
Answers: 2
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