Question

answer please for all two questions

Answer 1

Heya friend,

Here is the answer:

1) Difference between sliding and rolling friction:

* Sliding friction:
- When a body slides over another surface is called as sliding friction
- The friction is more than rolling friction
- Eg: sliding in the park

* Rolling friction:
- When a body rolls over another surface is called as rolling friction
- The friction is less than sliding friction
- Eg: A golf ball

2) Objects moving in air and water needs a streamlined shape because to cut through the air/water and reduces the friction drag of the fluids (air/water)

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Hope my answer helps you

Regards,
Shobana
^_^

Answer 2

Hii
here is ur ans
●●ROLLING FRICTION :- when an object rolls over the surface of another object , the resistance to its motion is called rolling friction.
SLIDING FRICTION :- The frictional force present when an object moves slowly over the surface of another object is known as sliding friction.
......
●● Objects moving in fluids should have special shapes because when an object having a special or streamlined shape moves very fast , then the fluid can flow past the moving object smoothly , reducing the fluid friction.
Hope it helps uh☺