<span>The moving car has some momentum, but
the stationary truck has none.
Momentum of any object is (mass) times (speed).
If the object isn't moving then it has no speed,
and its momentum is zero, no matter how much
mass it may have.</span>
Think of it like a graph. You start at the origin which is (0,0). go three to the east which now you are (3,0). Then, six to the north. Now, you are at (3,6). 1 to the east, ((4,6). Then you go 4 to the west which is back tracking. So, you end at (0,6) which is saying you are now 6 km north from your campsite.
Hope this helps!
Answer:
2 revolutions.
Explanation:
We need to obtain the angular velocity when he is in the air.
The angular momentum is given by:
Because of angular momentum conservation L1=L2, so the final angular velocity is given by:
We need to calculate the time the skater is in the air, so we need to use the formula of parabolic motion:
so the time taken is 1.26s
the angular displacement is given by:
the number of revolutions is given by:
the skater execute two complete revolutions in the air.
It should be 12 N. the force of the book on the table should be the same as the force of the table on the book.
Answer:
I would say B
Explanation:
the other ones don't seem right