Answer:
884 m
Explanation:
The motion of the baseball is a projectile motion: a uniform motion along the horizontal direction and a uniformly accelerated motion along the vertical direction.
The horizontal range of a projectile (the horizontal distance covered by the object before it reaches the original vertical height) is given by
where
u is the initial speed
is the angle of launch
g = 9.8 m/s^2 is the acceleration of gravity
For the ball in this problem,
u = 100 m/s
Substituting into the equation, we find the range of the ball:
so, the ball will cover 884 m before reaching the original vertical level.
I agree with the answer above, but since velocity is a vector, I think displacement would be a better answer :)
Explanation:
Power = Energy / Time
When the velocity doubles the kinetic energy increases by a factor of 4.
So if the time is constant and the velocity doubles, then the power will increase to a factor of 4.
Answer
30 mi/gal * (1.61 km / mi ) / (3.78 L/gal) = 30 * .426 km/L = 12.8 km/L