It should be C. If the object is denser than the fluid, it will sink. If it isn't, it will float
Answer:
The rock's speed after 5 seconds is 98 m/s.
Explanation:
A rock is dropped off a cliff.
It had an initial velocity of 0 m/s. And now it is moving downwards under the influence of gravitational force with the gravitational acceleration of 9.8 m/s².
Speed after 5 seconds = V
We know that acceleration = average speed/time
In our case,
g = ((0+V)/2)/5
9.8*5 = V/2
=> V = 2*9.8*5
V = 98 m/s
Gravitational forces are forces of attraction. It's like the Earth pulling on you and keeping you on the ground.
first off lemme just say this is really easy man, just look at the directions
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