Here's why:
* Gravity: The Earth exerts a gravitational force on all objects near its surface. This force is what causes objects to fall towards the ground.
* Newton's Second Law: Newton's Second Law of Motion states that force (F) is equal to mass (m) times acceleration (a): F = m * a.
* Acceleration Due to Gravity: The acceleration due to gravity on Earth is approximately 9.8 m/s².
* Calculation: To counter the force of gravity on a 1 kg object, you need an equal and opposite force:
* F = m * a
* F = 1 kg * 9.8 m/s²
* F = 9.8 Newtons
Important Note: This calculation assumes the object is at rest or moving at a constant velocity. If the object is accelerating upwards, you would need a force greater than 9.8 Newtons.
