Answer: question D is trough
Explanation: I learned this already
C is the answer I think good luck
Answer:
18,316.2
Explanation:
The formula for GPE is mgh, where
M = Mass of the object
G = Acceleration due to gravity (9.8 m/s^2 on Earth)
H = Height above ground
890 × 9.8 × 2.1 = 18,316.2
Answer:
The air resistance on the skydiver is 68.6 N
Explanation:
When the skydiver is falling down, there are two forces acting on him:
- The force of gravity, of magnitude
, in the downward direction (where m is the mass of the skydiver and g is the acceleration due to gravity)
- The air resistance,
, in the upward direction
So the net force on the skydiver is:

where
m = 7.0 kg is the mass

According to Newton's second law of motion, the net force on a body is equal to the product between its mass and its acceleration (a):

In this problem, however, the skydiver is moving with constant velocity, so his acceleration is zero:

Therefore the net force is zero:

And so, we have:

And so we can find the magnitude of the air resistance, which is equal to the force of gravity:
