The new gravitation force at the new location is 40 N
Explanation:
The weight of the astronaut is given by the equation
(1)
where
m is the mass of the astronaut
g is the acceleration of gravity
The acceleration of gravity at a certain distance from the centre of the Earth is given by
where G is the gravitational constant and M is the Earth's mass. So we can rewrite eq.(1) as
When the astronaut is on the Earth's surface, (where R is the Earth's radius), so his weight is
Later, he moves to another location where his distance from the Earth's surface is 3 times the previous distance, so the new distance from the Earth's centre is
Therefore, the new weight is
Which means that his weight has decreased by a factor 16: therefore, the new weight is
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Anything that is medal is connected to earth
Answer:
The arrow was moving at 16.2 m/s
Explanation:
The law of conservation of energy says that the kinetic energy of the arrow must be converted into the potential energy of the block and arrow after it they join:
where is the mass of the arrow, is the mass of the block, of the change in height of the block after the collision, and is the velocity of the arrow before it hit the block.
Solving for the velocity v, we get:
The arrow was moving at 16.2 m/s
Answer:
Some examples of objects that are in free fall include:
A spacecraft in continuous orbit. The free fall would end once the propulsion devices turned on.
An stone dropped down an empty well.
An object, in projectile motion, on its descent.
None. We already have more than we need ... provided only that the lane is on Earth.
Weight = (mass) (gravity).
On Earth, 'gravity' = 9.8 m/s^2.
Weight of the ball =
(4.5 kg) (9.8 m/s^2).= 44.1 newtons.
(roughly 9.9 pounds)