A ball bearing is gently released from rest and allowed to fall through a viscous fluid. Which of the following statements about the motion is correct?
its acceleration decreases before terminal velocity is attained
when terminal velocity is attained the acceleration of the fluid becomes zero
its velocity increases before terminal velocity is attained
there is no resultant force on the ball before it attains terminal velocity
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The answer is A
The body falls downwards which means it attains more velocity till it falls into the liquid, then the body is acted upon by the upthrust which tries to balance the weight until it no longer accelerates. At this point, it has attained terminal velocity
the answer is A because acceleration of object decreases before terminal velocity is reached and eventually turns zero when terminal velocity is reached. that is the acceleration of the body turns zero and not the acceleration of the fluid.
The correct answer is:
**C. its velocity increases before terminal velocity is attained**
Here's why:
- When a ball bearing is released into a viscous fluid, it initially accelerates due to the force of gravity.
- As the ball's velocity increases, the resistive force (drag) from the fluid also increases.
- Eventually, the resistive force balances the gravitational force, and the ball reaches a constant velocity known as the terminal velocity. At this point, the net force and the acceleration of the ball become zero.
Therefore, before reaching terminal velocity, the velocity of the ball bearing increases.
Terminal velocity us the MAXIMUM VELOCITY attained by an object as ut falls through a fluid
note: this occurs when the drag force(air resistance) is equal to acceleration due to gravity
therefore, the acceleration is zero
the answer is A not B
please correct this so others aren't misguided
Your answer is wrong...
So sad 💔
Expected much from this forum but wrong answers got me overwhelmed
