The acceleration of gravity (on Earth) is 9.8 m/s² downward.
This means that every falling object gains 9.8 m/s more downward speed
every second that it falls.
In 5 seconds of falling, it gains (5 x 9.8 m/s) = 49 m/s of downward speed.
If it was already descending at 2.0 m/s at the beginning of the 5 sec,
then at the end of the 5 sec it would be descending at
(2 m/s + 49 m/s) = 51 m/s .
The type of conversion that is taking place when natural gas is
burned to heat water is referred to as chemical conversion. In this
conversion thermal energy is produced.
If a main sequence star is cooling and expanding, it is entering the red giant stage. This means that the star has burned up all of it's hydrogen and is now starting to burn its helium making it cooler.
Explanation:
They will have not much control over their speed or rotational energy. they will carry a lot of gravitation potential energy which will get converted to kinetic energy as they fall through the atmosphere. They will reach their terminal velocity, the fastest they can travel with earth's gravity before they pull their parachute, when they use a parachute to extend their surface area, increasing wind resistance. this allows them to land safely.
Answer:
The net force acting on the person is, F = 560 N
Explanation:
Given data,
The downward acceleration of the elevator, a = 1.8 m/s²
The weight of the person is, W = mg
= 686 N
Therefore the mass of the person,
m = W /g
= 686 / 9.8
= 70 kg
The net force acting on the person,
F = mg - ma
= 686 - 70 x 1.8
= 560 N
Hence, the net force acting on the person is, F = 560 N
