2. A 5 kg block moves with a constant speed of 10m/s to the right on a smooth surface where frictional forces are
considered to be negligible. It passes through a 2.0 m rough section of the surface where friction is not negligible,
and the coefficient of kinetic friction between the block and the rough section 4, is 0.2. What is the change in the
kinetic energy of the block as it passes through the rough section?
A. 20 J of energy is removed from the block.
C. 250 J of energy is removed from the block.
B. 20 J of energy is added to the block.
D. 250 J of energy is added to the block.
Answers: 2
Another question on Physics
Physics, 22.06.2019 17:40
Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.
Answers: 1
Physics, 22.06.2019 23:20
Acharge q experiences no net force at a particular point in space. which of the following situations described below must always be true? -there are no other charges nearby. -if there are other charges nearby, they must all have the same sign as q. -if there are other charges nearby, they must all have the opposite sign of q. -if there are other charges nearby, the total positive charge must equal the total negative charge. -none of the above
Answers: 2
Physics, 23.06.2019 00:30
Madison lives near the ocean. she’s formed a hypothesis that increased concentrations of salt in the air speeds the corrosion of certain metals. if madison plans to test this hypothesis, she will have to deal with the following variables in her experiment: dependent variable: independent variable: one possible confounding variable:
Answers: 1
You know the right answer?
2. A 5 kg block moves with a constant speed of 10m/s to the right on a smooth surface where friction...
Questions
Social Studies, 03.05.2021 21:00
Mathematics, 03.05.2021 21:00
Mathematics, 03.05.2021 21:00
Mathematics, 03.05.2021 21:00
Mathematics, 03.05.2021 21:00
Mathematics, 03.05.2021 21:00
Spanish, 03.05.2021 21:00
Biology, 03.05.2021 21:00
Mathematics, 03.05.2021 21:00
