Force = (mass) x (acceleration)
= (0.75 kg) x (25 m/s²)
= (0.75 x 25) kg-m/s²
= 18.75 newtons .
Note that even though we're talking about a 'hit', the acceleration only
lasts as long as the bat is in contact with the ball. Once the ball leaves
the bat, it travels at whatever speed it had at the instant when they parted.
Any change in its speed or direction after that is the result of gravity, air
resistance, and the fielder's mitt. I learned a lot about these things a few
weeks ago, since I live in Chicago, about 6 miles from Wrigley Field, in
a house full of Cubs fans.
<u>Answer:</u>
"The momentum of objects depends upon how much volume they occupy" is FALSE.
<u>Explanation:</u>
The quantity of movement by a body is estimated as a function of its mass and velocity.The quantity of momentum an object can have it depends on two variables i.e how much mass moves and how quickly the mass moves. In simple it is dependent on mass and velocity.
There is a difference between mass and volume, as mass is the quantity of matter an object contains while volume is space occupied by mass. For an instance, the bowling ball have more momentum than a basketball, because bowling ball have much more mass and velocity than basketball, although both type of ball have approximately same volume.
Answer:
They must have about 166 randomly 60 watt light bulbs to achieve the result
N = 166
Explanation:
σ = 30
% 99 = 2.576
Using the standard equation of statistics knowing the difference between the measurement have a margin error no larger than 6 can solve
σ = √∑ ( x - z' )² / N
Solve to N
N = ( % * σ / Δ x ) ²
N = ( 2.576 * 30 / 6 )²
N = 12.88 ²
N = 165. 89 44 ≅ 166
Answer:
K remains constant
Explanation:
The magnetic force does not do any work on the ion.
In fact, the magnetic force due to a magnetic field is always perpendicular to the motion of the charge itself. Keep in mind that the work done by a force is given by
where F is the magnitude of the force, d is the displacement of the particle, and 
is the angle between the direction of the force and the displacement. Since the magnetic force is perpendicular to the displacement of the ion, then 
and 
, so the work done is zero.
For the work-energy theorem, the work done on the ion is equal to the variation of its kinetic energy:
However, since W=0, then 
, which means that the kinetic energy of the ion does not change.
