There are. . . . . . types of friction.
a) three
b) two
c) five
d) seven
The friction force that tends to prevent a stationary object from starting to move is called . . . . . . friction.
a) static
b) kinetic
c) both a & b
d) none of these
Static friction is denoted by . . . . . . .
a) fr
b) fk
c) fs
d) fx
The frictional force that acts against during motion of an object in a direction opposite to the direction of motion is called . . .. . . friction.
a) static
b) kinetic
c) zero
Kinetic friction is denoted by . . . . . . .
a) fr
b) fk
c) fs
d) fx
Kinetic friction is . . . . . . to/than static friction.
a) equal
b) greater
c) same
d) less
