Answer:
a)
b)
c)
The estimate is low.
Explanation:
a) Using the energy conservation we have:
we have kinetic energy intially and gravitational potential energy at the maximum height.
b) We can use the equation of the gravitational force
(1)
We have that:
(2)
at the surface G will be:
Now the equation of an object at a distance x from the surface.
is:
Using that dv/dt is vdx/dt and integrating in both sides we have:
c) The difference is:
So the percent difference will be:
The estimate is low.
I hope it helps you!
Before it hits the sand bed, the meteorite is accelerating uniformly with 
, so that its speed 
satisfies
where 
is its initial speed and 
is its change in altitude. Notice that we're taking the meteorite's starting position in the atmosphere to be the origin, and the downward direction to be negative. Now,
Answer: B) 0 mph
Explanation:
Velocity is a vector quantity. It can be measured as rate of change of displacement.
Displacement is the straight path length between final and initial position of the body in motion.
It is given that the car goes from point A to point B and the returns to Point A. Hence, the net displacement of the car is 0 as the car comes back to its initial position.
Therefore, the velocity of the car is 0 mph.
Option B is correct.
Answer:
The gravitational potential energy (PE) of a particle or a system of particles is a form of energy that exists due to its position. Mathematically, it is expressed as the product of mass, gravitational acceleration, and the vertical displacement.
Explanation:
Given data:
Mass of the storage box, 
Height, 
The gravitational potential energy of the storage box can be expressed as,
