Question

A ball kicked with same initial speed will travel farthest on
a. muddy surface
b. cemented surface
c. polished marble surface
d. brick surface ​

Answer 1

question :

A ball kicked with same initial speed will travel farthest on

a. muddy surface

b. cemented surface

c. polished marble surface

d. brick surface ​

ANSWER :

c)polished marble surface.

reason :

the surface of the marble have the least irregularities among mud, cement, brick. As the irregularities are less, the friction will be also less. Hence, the ball will take much time to reduce the velocity and come to a stop, means it will cover farthest distance .

the other surfaces like mud, cement and brick have much more irregularities on their surface , hence the friction between ball and surface will be greater, leading to the ball stopping earlier.

Additional Information :

• irregularity of surface ∝  friction

means , greater regularity results to greater friction

• friction ∝ 1/velocity

means, increasing friction result in decreasing speed with constant force.