Answer:
1.034m/s
Explanation:
We define the two moments to develop the problem. The first before the collision will be determined by the center of velocity mass, while the second by the momentum preservation. Our values are given by,
<em>Part A)</em> We apply the center of mass for velocity in this case, the equation is given by,
Substituting,
Part B)
For the Part B we need to apply conserving momentum equation, this formula is given by,
Where here 
is the velocity after the collision.
Yes. Think of block sitting on top of a bigger block. If the bottom block moves, it will drag the top block with it. Since the force of friction on the small block and its displacement are in the same direction, the "work" is positive. The static friction is a passive force, It is not a source of energy; it transmits the force placed on the bottom block. (And the "work" done by the friction on the bottom block is exactly the negative of the work done on the top block.)
Answer:
A. Tends to get shorter.
Explanation:
When a constant current is sent through a helical coil, then currents are different turns will be equal as well as in the same direction. As currents in same direction attract each other, hence coil tends to get shorter.
To solve this problem it is necessary to use the concepts of Force of a spring through Hooke's law, therefore,
Where,
k = Spring constant
x = Displacement
Initially our values are given,
PART A ) With this values we can calculate the spring constant rearranging the previous equation,
PART B) Since the constant is unique to the spring, we can now calculate the force through the new elongation (0.38cm), that is
Therefore the weight of another person is 265.79N.
Answer:
A bowling ball stored on a high shelf has more potential energy
A base ball on the same shelf should rather fall on my head
Explanation:
Potential energy =mgh where m= mass, g= gravitational force and h is height
The bowling ball is bigger and heavier than the base ball
which means more mass . The remaining parameters are constant.
This means the bowling ball has more potential energy.
Since the base ball is lighter then it’s preferable to land on someone’s head due to the lesser force it will expert and lesser pain too.
