Question

Choose the correct answer.
2. It is difficult to walk on the ice floor because of the
3. Which of the following method is used to increase friction?
ZONE

spikes to increase
1.
Athletes wear
electrostatic force
a gravitational force
a.
b. muscular force
frictional force
friction
value of
a. low
c. high
b. moderate
d. zero
a. Polishing
c. Lubrication
b. Using soap solution
d. Using rubber grip on cricket bats
handles
14. Which of the following unit can be used to measure friction?
a. N
C. N/m2
b. Pa
d. m2
5. Use of lubricants makes the surface
a. smooth
C. rough
b. shiny
d. both (a) and (b)
6. Which of the following is used to reduce friction?
a. Ball bearing
b. Spikes in athletic shoes
c. Set of grooved tyres
d. Grinding stone​

Answer 1

Answer:

Explanation:

It's difficult to walk on ice because there's very little friction between the bottoms of your shoes and the ice. Friction is a force that opposes motion. When your shoes push back on the ground the force of friction between the ground and your shoes pushes you in the opposite direction, propelling you forward.

There are two methods of increasing friction: one is by making the surfaces rough and the other by increasing the mass of the object that is moving. For example, the tyres of vehicles have treads (these are the 'designs' that you can see on the tyre surface), which increase the friction between the tyre and the road.

Answer 2

Answer:

1) frictional force

2) low

3) using rubber grip on cricket bats handles

4) N

5) ball bearing