Hello, Watch the video of the can moving across the surface. What can the child do to create a greater force of friction?
two hands moving a can back and forth on a table
Make the table wet.
Place a cloth on the table.
Use less force when pushing the can.
Use more force when pushing the can.
Question 6(Multiple Choice Worth 2 points)
(06.03 MC)
Where is the friction that allows the skater to complete the move that is occurring in this image?
a girl ice skating
© Wildcow / iStock 2018
The movement of her skirt through the air
The movement of her body through the air
The point of contact between the skates and the ice
The point of contact between the skates and her foot
Question 7(Multiple Choice Worth 2 points)
(06.03 LC)
If you roll a ball down a ramp, which factor will have the greatest effect on the amount of friction created?
Force applied to the ball
Speed of the ball
Texture of the surface
Weight of the ramp
Question 8(Multiple Choice Worth 2 points)
(06.03 MC)
Heather rolls a marble over sand paper and then over a flat table. Which statement best describes the observations she made?
When the marble is pulled, the friction on the table is greater.
When the marble is pushed, the friction is greater on the sandpaper.
The amount of friction is about the same on both surfaces.
The force of gravity pulling the marble lessens the friction between the surfaces.
Question 9(Multiple Choice Worth 2 points)
(06.03 LC)
How does the force of friction affect the motion of objects?
It causes the object to change direction.
It causes the object to create heat energy.
It causes the object to create kinetic energy.
It causes the object to slow down or stop.
Question 10(Multiple Choice Worth 2 points)
(06.03 LC)
All surfaces have texture, which means it affects how things move over it. When it takes a long time for friction to slow down an object, what is most likely true about the surface the object is moving on?
The surface is dry.
The surface is rough.
The surface is uneven.
The surface is smooth.
Instructors monitor ALL areas of a student's account
Student e-mail accounts are to be used for FLVS course-related email only and not for general introductions or spamming of people in your address book.
Please remember to click the Logoff link when you have completed your work in the course.
FDK411.12
Answers: 1
Physics, 22.06.2019 02:30
The particle in a two-dimensional well is a useful model for the motion of electrons around the indole ring (3), the conjugated cycle found in the side chain of tryptophan. we may regard indole as a rectangle with sides of length 280 pm and 450 pm, with 10 electrons in the conjugated p system. as in case study 9.1, we assume that in the ground state of the molecule each quantized level is occupied by two electrons. (a) calculate the energy of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels. 9.27 electrons around the porphine ring (4), the conjugated macrocycle that forms the structural basis of the heme group and the chlorophylls. we may treat the group as a circular ring of radius 440 pm, with 20 electrons in the conjugated system moving along the perimeter of the ring. as in exercise 9.26, assume that in the ground state of the molecule quantized each level is occupied by two electrons. (a) calculate the energy and angular momentum of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels.
Answers: 1
Physics, 22.06.2019 07:00
The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse
Answers: 1
Physics, 22.06.2019 15:00
Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.
Answers: 1
Hello, Watch the video of the can moving across the surface. What can the child do to create a great...
SAT, 28.10.2020 22:20
Mathematics, 28.10.2020 22:20
Mathematics, 28.10.2020 22:20
Biology, 28.10.2020 22:20
English, 28.10.2020 22:20
History, 28.10.2020 22:20
Mathematics, 28.10.2020 22:20
Health, 28.10.2020 22:20
Social Studies, 28.10.2020 22:20
Engineering, 28.10.2020 22:20