What would be different about the heat of fusion & vaporization ? and why?
1 answer:
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1) The horizontal range of the laptop is 75.0 m
2) The initial vertical component of the velocity is 14.7 m/s
Explanation:
1)
The motion of the laptopin this problem is a projectile motion, so it follows a parabolic path which consists of two independent motions:
- A uniform motion (constant velocity) along the horizontal direction
- An accelerated motion with constant acceleration (acceleration of gravity) in the vertical direction
To find the horizontal range of the laptop, we just need to analyze its horizontal motion.
We know that:
- The laptop moves horizontally with a constant velocity of
- The time of flight of the laptop is
So, the horizontal range of the laptop is given by
2)
The total time of flight of a projectile is given by
where
is the initial vertical component of hte velocity
is the acceleration of gravity
Here we know that the time of flight is
Therefore, we can solve the formula for , to find the initial vertical velocity:
Learn more about projectile motion:
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Answer:
I2>I1
Explanation:
This problem can be solved by using the parallel axis theorem. If the axis of rotation of a rigid body (with moment of inertia I1 at its center of mass) is changed, then, the new moment of inertia is gven by:
where M is the mass of the object and d is the distance of the new axis to the axis of the center of mass.
It is clear that I2 is greater than I1 by the contribution of the term Md^2.
I2>I1
hope this helps!!