Answer:
and .
Explanation:
From the conservation of the mechanical energy, we have that:
Since the diver is in free fall, her initial velocity is zero. So her initial kinetic energy is also zero. Then, we get:
We will first calculate the final kinetic energy. Solving for K_f, we have:
So the kinetic energy when the diver is 1.00m above the water is 1080J.
Finally, we solve for the final potential energy U_gf:
In words, the gravitational potential energy when she is 1.00m above the water is 539J.
Answer:
The forces are equal!
Explanation:
Both corks are subjected to the same buoyant force.
Answer:
The ping pong ball, the light molecules have greater speed
Explanation:
The kinetic energy of an object is defined as
where
m is the mass of the object
v is its speed
It follows that the speed can be written as
In this problem, both the golf ball and the ping pong ball have kinetic energy K. However, the mass of a gold ball is larger (approx. 45 g) than that of a ping pong ball (approx. 4 g): therefore, since v is inversely proportional to the square root of the mass, it follows that the ping pong ball must have a greater speed in order to achieve the same kinetic energy of the golf ball.
The same argument can be applied to the gaseous mixture: if there are more massive molecules and light molecules, and if they all have the same kinetic energy, then this means that the light molecules must have a greater speed, as a result again of the equation
Answer:
Explanation:
Given
radius of neutron star
Centripetal force on material having mass m is given by
Gravitational Force between neutron star and mass m is
,where M=mass of Neutron star
equating centripetal Force and Gravitational Pull
Most likely gravity, because the gravity would pull it off course or wobble.