160
Question: Calculate the density of the circus dumbbell?
Answer: ______________________________________________________
Task 20. Birch Leaves
Leaf’s weight, which was fell from a birch - 0.1 g, and the weight of the cat
Yashka, dreaming about birds and fell from the same birch, 10 kg.
Question: How many times the force of gravity acting on the falling leaf, less
than the force of gravity acting on the falling cat?
Answer:_______________________________________________________
Task 21.
Shuttle Bus use 60 kg gasoline per day. How many cubic meters is gassing in
the city, polluting the environment? The density of the gas at a temperature of 0 ° C is
0,002 kg / m
3
. What methods of protection of atmospheric air from pollution by
emissions from motor vehicles can you name?
Answer: ______________________________________________________
Task 22. Snow skiing piste
To make a turn on your skis need to make fairly complex body movements. For
example, when you schuss, in the normal position of the body skis goes straight. The
movement of the body rotates forward or backward.
Question: Explain why? What are the forces caused by this turn?
Достарыңызбен бөлісу: 
