baseball player hits a line drive estimated to have traveled 145 meters the ball leaves the bat with a horizontal velocity of 40
1 answer:
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Answer:
Vertical Height = 0.784 meter, Speed back at starting point = 10 m/s
Explanation:
Given Data:
V is the overall velocity vector, and
are its initial vertical and horizontal components
To find:
Max Height achieved
Calculation:
1) Using the equation of motion, we know
2) In terms of gravity height
and the vertical component of Velocity
.
3) As as at maximum height the vertical component of velocity is zero maximum height achieved
putting values
4)
5) As for the speed when it reaches back its starting point, it will have a speed similar to its launching speed, the reason being the absence of air friction (Air drag)
Answer:
75Watts
Explanation:
Given parameters:
Time = 12s
Force applied = 20N
Height = 45m
Unknown:
Power output = ?
Solution:
Power is defined as the rate at which work is done.
It is mathematically expressed as;
Power =
Work done = force x distance = 20 x 45 = 900J
Power = = 75Watts
Answer:
%
Explanation:
From special theory of relativity the dynamic mass m is related with the rest mass of the body as
Here, c is the speed of light and v is the velocity of object.
Given mass of the golf ball is 120 g.
Now applying the binomial theorem and solve the above equation.
Therefore, increase in mass is,
Now percentage of increase in mass with rest mass is,
Therefore, the percentage of increase in mass with rest mass is .