Physics, 29.06.2019 14:00 ErikHabdlowich
Acar of 1000 kg with good tires on a dry road can decelerate (slow down) at a steady rate of about 5.0 m/s2 when braking. if a car is initially traveling at 20 m/s (45 mi/h), (a) how much time does it take the car to stop? (b) what is its stopping distance? (c) what is the deacceleration? (d) how big is the net force to be applied to stop this car? (e) calculate the work done by this force (work = force * distance). (f) during the stopping process, what happens to the car's kinetic energy?
Answers: 2
Physics, 22.06.2019 07:10
Polly is pushing a box across the floor with a force of 30 n. the force of gravity is β8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?
Answers: 2
Physics, 22.06.2019 07:20
What is the magnitude of the acceleration vector which causes a particle to move from velocity β5iβ2j m/s to β6i+ 7j m/s in 8 seconds. answer in m/s.
Answers: 3
Physics, 23.06.2019 00:00
You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.
Answers: 1
Acar of 1000 kg with good tires on a dry road can decelerate (slow down) at a steady rate of about 5...
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