Question

a ball is thrown straight up in the air name the two forces that act to oppose its motion as it moves upwards ​

Answer 1

Explanation:

As the ball moves through the air, the air resists the motion of the ball and the resistance force is called drag. Drag is directed along and opposed to the flight direction.

Answer 2

Answer:

As the ball is thrown straight up in the air, the two forces that act to oppose its motion as its move upwards are :

1. Gravitational force exerted by the earth
2. Frictional force by the air which is also known as drag.

Explanation:

1. Gravitational force is the force of attraction between any two bodies that is directly proportional to the product of the masses of two bodies and is inversely proportional to the square of the distance between the bodies.
2. Gravitational force always act towards the centre of the earth. When the ball is thrown up, the motion of the ball is away from earth and the gravitational force is towards the earth. So the gravitational force of the ball is opposite to the direction of motion.
3. As an object moves through the air, the air resists the motion of the object. This resistance is known as drag. Air flowing over the surface of the ball is slowed down by friction with the surface of the ball until it comes to rest at a point known as the separation point.  

Hence these two forces affect the motion of the ball in the air.

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