A curve ball is a type of pitch in which the baseball spins on its axis as it heads for home plate. If a curve ball is thrown at
1 answer:
Answer:
19.35 revolutions.
Explanation:
Let the home plate is 18.3 m (60 ft) from the pitching mound and that the baseball travels at a constant velocity.
Given that,
Velocity of ball = v = 34.5 m/s
Spin rate of ball = 26 revolutions/s
Distance between home plate and pitching mound = s = 18.3 m
We need to find the number of revolutions it complete before reaching home plate. It can be calculated as follows:
So, there are approx 19.35 revolutions.
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Answer:
speed of star is 1.37 × m/s
it is approaching to earth because wavelength of star is decreasing than rest
if emit same wavelength it does not move anywhere
it will remain steady condition with respect earth
Explanation:
given data
wavelength = 656.5 nm
rest wavelength = 656.8 nm
to find out
the speed of the star , is it approaching
solution
we know here equation that is
wavelength shift / wavelength at rest = velocity of source / speed of light
so put all value and find
velocity of source = 3 × × 3 ×
/ 656.8 ×
velocity of source star = 1.37 × m/s
and
it is approaching to earth because wavelength of star is decreasing than rest
and
if emit same wavelength it does not move anywhere
it will remain steady condition with respect earth
Answer:
0.51 m
Explanation:
Using the principle of conservation of energy, change in potential energy equals to the change in kinetic energy of the spring.
Kinetic energy, KE=½kx²
Where k is spring constant and x is the compression of spring
Potential energy, PE=mgh
Where g is acceleration due to gravity, h is height and m is mass
Equating KE=PE
mgh=½kx²
Making x the subject of formula
Substituting 9.81 m/s² for g, 1300 kg for m, 10m for h and 1000000 for k then