Question

4.7 - A 68.5-kg skater moving initially at 2.40 m/s on rough hori-
zontal ice comes to rest uniformly in 3.52 s due to friction from the
ice. What force does friction exert on the skater?​

Answer 1

Answer:

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Answer 2

Answer:

1Which of the following statement is or are incorrect? (a) The pollen grain move on the surface of water because they are constantly being hit by the fast moving particles of water (b) when a beam of sunlight enter a room we can see tinny dust particles suspended in air which are moving rapidly in a very haphazard way (c) the zigzag movement of the small particles suspended in a liquid or gas is called Brownian motion (d) the particles of matter do not attract each oothe

Explanation:

1Which of the following statement is or are incorrect? (a) The pollen grain move on the surface of water because they are constantly being hit by the fast moving particles of water (b) when a beam of sunlight enter a room we can see tinny dust particles suspended in air which are moving rapidly in a very haphazard way (c) the zigzag movement of the small particles suspended in a liquid or gas is called Brownian motion (d) the particles of matter do not attract each other