Answer:
Explanation:
When a projectile is launched at some angle to the horizontal with some speed vi , and air resistance is negligible , it is definitely a freely falling body .
It is so because it is free to accelerate towards the earth with acceleration of g . Air has no resistance , hence no force is acting on it except the gravitational force . Hence it is a freely falling body .
b )
The acceleration in the vertical direction is due to force exerted by the earth that is gravitational force on it . Hence its acceleration is equal to g in vertically downward direction .
c )
It has zero acceleration in horizontal direction . It is so because no force is acting on it in horizontal direction . So no acceleration will be present in horizontal direction . It will move in horizontal direction with constant speed of vi cos θ where θ is the angle vi make with the horizontal .
Newton’s second law of motion is force equals mass times acceleration.
F = m•a
An example of this would be hitting a ball. If you hit the ball, it will move however fast you hit the ball. The harder you hit the ball, the faster it will move.
hope this helps and brainliest please
The longer the lever the longer the power
Answer:1.Air, 2.the ground,3.water
Explanation:I just got it right:)
Answer:
2.568 × 10⁻³ kg
Explanation:
The amount of sodium to be taken by an adult is measured in terms of a limit, as given here.
That limit has been set as 2568 mg , when measured in milligrams.
The basic conversion from milligrams to g is done by dividing with 1000. Then 2568 milligrams will be 2.568 grams.
Now 100 grams are present in 1 kilogram.
So 2.568 grams are divided with 1000 to get the specified mass in kg.
The gives it as 2.568 × 10⁻³.