Answer:
5.31143691523 m/s²
Explanation:
m = Mass = 280 g
x = Displacement of spring = 21.7 cm
Time period
Angular velocity is given by
From Hooke's law
The acceleration due to gravity on the planet is 5.31143691523 m/s²
Yes, I have been able to satisfy my curiosity.
A vector is a quantity with D. A quantity with magnitude and direction
Explanation:
There are two types of quantity in physics:
- Scalar: a scalar quantity is a quantity having a magnitude only. Examples of scalar quantities are:
Distance
Speed
Time
Energy
...
- Vector: a vector quantity is a quantity having both a magnitude and a direction. This means that it is not enough to specify what is the magnitude of the quantity (the number), but we also need to specify its direction.
Examples of vector quantities are:
Displacement
Velocity
Acceleration
Force
....
So, the correct answer is
D. A quantity with magnitude and direction
Learn more about vectors here:
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It is estimated that the current rate of species extinction is between 1,000 and 100,000 times more rapid than the average rate during the last several billion years. The growth of human populations, consumption levels, and mobility is the root of most of the serious threats to biodiversity today.
Here's a formula for the distance an object falls from rest:
D = (1/2) A T² ... <== MEMORIZE THIS
Distance = (1/2) · (acceleration) · (time²)
On Earth, the acceleration of gravity is always 9.8 m/s². So for a fall that starts with zero speed, the formula says
70 m = (1/2) (9.8 m/s²) (time²)
70 m = (4.9 m/s²) (time²)
Divide each side by (4.9 m/s²) ;
time² = (70 m) / (4.9 m/s²)
time² = (70/4.9) sec²
time = √(70/4.9) seconds
time = 3.78 seconds