2. A student wants to make a model to show how friction works. Which of the following ideas best demonstrates friction?
A. Pour water into a cup and then slowly pour it out again
B. Bounce a rubber ball up and down on an icy surface.
C. Drop a heavy rock from a large distance down onto modeling clay.
D. Wrap tape with sticky side out around a ball and roll it along a surface.
3. The force that prevents a ball rolling on the ground from continuing on its path forever is:
A. Inertia
B. momentum
C. friction
D. kinetic energy.
4. Friction acts between two metal blocks that slide past each other. Why would a coating of all between the two blocks
reduce the friction?
A. The oil increases the surface contact between the two blocks.
B. The oil decreases the speed at which the two blocks can slide.
C. The old Pils in tiny spaces so the sliding surfaces are smoother.
D. The oil makes the surfaces stickier so that the sliding speed increases.
5. Friction causes the kinetic energy of a rolling ball to be converted into:
A momentum
B. heat energy
C. inertia
D. chemical energy
А.
40 POINT
Answers: 3
Chemistry, 22.06.2019 09:00, krystalhurst97
How are isotopes of the same chemical element alike? how are they different?
Answers: 1
Chemistry, 23.06.2019 04:31, CassidgTab
Which molecules are more strongly attracted to one another -c3h8o molecules that make up liquid rubbing alcohol or ch4 molecules that make up methane gas
Answers: 3
2. A student wants to make a model to show how friction works. Which of the following ideas best dem...
English, 11.08.2021 14:00
Mathematics, 11.08.2021 14:00
Physics, 11.08.2021 14:00
English, 11.08.2021 14:00
Business, 11.08.2021 14:00