A body is thrown vertically upwards and returns to the thrower. The direction of fluid friction on the body is vettically ______ during upwarf journeyand vertically _______ during downward journey.
Answers
Answer: A body is thrown vertically upwards and returns to the thrower. The direction of fluid friction on the body is vertically downwards during upward journey and vertically upwards during downward journey.
Explanation:
The friction always acts in the opposite direction. Fluid friction resists the flow of layers of fluid. When a body is thrown vertically upwards, fluid friction acts in the opposite direction i.e. in downwards direction. In the downward journey of the body, the fluid friction tends resist its motion and and acts in the upward direction.
Hence, the correct answer is:
A body is thrown vertically upwards and returns to the thrower. The direction of fluid friction on the body is vertically downwards during upward journey and vertically upwards during downward journey.