# CBSE Class 11-science Physics Friction

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- What is friction? Explain how it takes place.
- State the types of friction.
- Explain briefly: (a) Static Friction (b) Kinetic friction
- State the methods to reduce friction.
- Ice skating is based on the phenomena of reduced friction. Explain briefly.
- Determine the acceleration of the car in which a box lying on its floor will remain stationary, given that the co-efficient of static friction between the box and the train's floor is 0.25.
- A ball of mass 1.5 kg lying on floor when given a velocity of 5 m/s gets stopped due to friction in 10 s. Calculate the coefficient of friction. Given g = 10 m/s
^{2}.

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