Buckyballs are used to. . . . . .
a) reduce friction
b) increase friction
c) reduce applying force
d) none
The friction between car tyres and road is . . . . . . friction.
a) static
b) rolling
c) kinetic
d) both a & b
Rolling friction is . . . . . to/than sliding friction.
a) less
b) greater
c) equal
d) none
Kinetic friction does not depend upon . . . . .
a) speed
b) area of contact
c) surfaces
d) both a & b
Tension:
The pulling force exerted by a stretched rope, string, cable or cord on an object to which it is attached is called a . . . . . force.
a) friction
b) tension
c) stress
d) strain
