Answer:
Hypotheses must be testable, and once tested, they can be supported by evidence. If a statement is made that cannot be tested and disproved, then it is not a hypothesis.
Explanation:
Let us assume that piece 1 is 
is facing west side. And, piece 2 is 
facing south side.
Let 
= m and 
= 2m. Hence,
= 10.5 m/s
= 10.5 m/s
= 
= 14.84 m/s
or, = 15 m/s
Hence, the speed of the third piece is 15 m/s.
Now, we will find the angle as follows.
= 
= 
= 
Therefore, the direction of the third piece (degrees north of east) is north of east.
Where the m1 and m2 is the mass of two object. U1 and U2 are the initial velocity of hockey pucks. V1 and V2 are the final velocity of Hockey Pucks.
m2=2kg The initial velocity of both pucks are 0. The v1=8m/s. All you have to do now is find v2
0=4-2v
-4=-2v
v=+2m/s
Answer: +2
Answer:
For a body moving at a uniform velocity you can calculate the speed by dividing the distance traveled by the amount of time it took, for example one mile in 1/2 hour would give you 2 miles per hour. If the velocity is non-uniform all you can say is what the average speed is.
Static equilibrium.
Static equilibrium is a kind of equilibrium which occurs when an object is at rest.
Hope this helps!
