Physics, 14.12.2019 00:31 maddy121209
A1 kg object is moving horizontally at 10 m/s when it hits and bounces off of the lower end of a bar hanging vertically at rest. assume kinetic energy is conserved. the bar has a length l of 1.2 m and a mass m of 3 kg and is pivoted about the upper end. immediately after the collision, the object moves with speed v at an angle relative to its original direction. the bar swings freely and reaches a maximum angle of 90° with respect to the vertical. the moment of inertia of the bar about the pivot is ibar = ml²/3.
Answers: 3
Physics, 22.06.2019 02:30
Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.
Answers: 2
Physics, 22.06.2019 05:30
An object weighs 40n in air, weighs 20n when submerged in water and 30n when submerged in a liquid of unknown density. what is the density of the liquid?
Answers: 2
A1 kg object is moving horizontally at 10 m/s when it hits and bounces off of the lower end of a bar...
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