6. When a ball is thrown up into the air, what two forces are at work?
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1 point
a Gravity
b Air Resistance
c Friction
d Inertia
a Gravity
When a ball is thrown up into the air, the two forces at work are:
1. Gravity: This force is always acting on the ball, pulling it downward towards the Earth. As the ball is thrown upward, gravity slows it down and eventually brings it back down.
2. Air Resistance: This force is caused by the air molecules colliding with the ball as it moves through the air. Air resistance acts in the opposite direction to the motion of the ball, slowing it down as it moves upward and also when it falls back down.
To determine the two forces at work when a ball is thrown up into the air, we need to understand the basic principles of motion. When a ball is in the air, two primary forces come into play: gravity and air resistance.
1. Gravity: Gravity is the force that pulls objects towards the Earth. It acts vertically downward, pulling the ball toward the ground. When the ball is thrown up into the air, gravity continues to act on it, causing it to decelerate and eventually reverse its direction.
2. Air Resistance: Air resistance is the force that opposes the motion of an object as it moves through the air. When the ball is thrown upward, it encounters air molecules, which create resistance and slow down its upward motion. As the ball moves higher, the force of air resistance increases until it eventually equals the force exerted by the thrower, bringing the ball to a stop in the air.
Therefore, the two forces at work when a ball is thrown up into the air are gravity (a) and air resistance (b).