Pure substances can be made of atoms that are attracted to each other or atoms that are not attracted to each other. Which type
1 answer:
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Answer:
Velocity (magnitude) is 98.37 m/s
Explanation:
We use the vertical component of the initial velocity, which is:
Using kinematics expression of vertical velocity (in y direction) for an accelerated motion (constant acceleration, which is gravity):
Now we need to find as a function of
. We use the horizontal velocity, which is always the same as follow:
We know the angle at 3 seconds:
Substitute in
and then solve for
With this expression we go back to the kinematic equation and solve it for initial speed
Answer:
b)
Explanation:
Rotational inertia of the sphere:
Rotational inertia of hollow sphere:
Rotational inertia of flat disk:
The largest value is 2/3 mr², therefore, hollow sphere's inertia is largest.