Which of the following types of motion are oscillatory? i.a diving board when used by a diver. ii. the motion of the balance wheel of a wrist watch. iii. the motion of the turn-table of a record player. iv. the motion of the center of a ten kobo piece as it rolls down an inclined plane. v. the motion of the needle of a D.C. ammeter into which a low A.C. current is passed
i and ii
i, ii and iii
ii, ii and iv
i, ii and v
iii, iv and iv
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The correct answer is D. i, ii, and v.
Oscillatory motion refers to repetitive back-and-forth movement around a central point.
The following options exhibit oscillatory motion:
i. A diving board when used by a diver: The board oscillates up and down due to the diver's weight and motion.
ii. The motion of the balance wheel of a wristwatch: The balance wheel oscillates to regulate the watch's timekeeping.
v. The motion of the needle of a D.C. ammeter into which a low A.C. current is passed: The needle oscillates due to the alternating current.
The other options do not exhibit oscillatory motion:
iii. The motion of the turn-table of a record player: Rotational motion, not oscillatory.
iv. The motion of the center of a ten kobo piece as it rolls down an inclined plane: Translational motion, not oscillatory.
So, the correct answer is D. i, ii, and v.
Let's break down each scenario to see if it involves oscillatory motion, which is basically back-and-forth movement around a central point:
* i. A diving board when used by a diver: Yes! When a diver jumps off, the board bends down and then springs back up, repeating this motion until it settles. This is a classic example of oscillation.
* ii. The motion of the balance wheel of a wrist watch: Also yes! The balance wheel in a mechanical watch rotates back and forth at a very precise rate, which is how the watch keeps time. This is another example of oscillation.
* iii. The motion of the turn-table of a record player: No. A record player's turntable rotates in a circle continuously in one direction. It doesn't move back and forth.
* iv. The motion of the center of a ten kobo piece as it rolls down an inclined plane: No. The coin rolls in one direction down the slope. It doesn't move back and forth around a fixed point.
* v. The motion of the needle of a D.C. ammeter into which a low A.C. current is passed: Yes! A DC ammeter measures direct current (flow in one direction). But if you put alternating current (AC, which changes direction) through it, the needle will try to follow the changing current and move back and forth around the zero point. This is oscillatory motion.
Therefore, the correct options are i, ii, and v.
which is D
Please I think you need to verify your answer maybe you made a little mistake.
On its back spin, the balance wheel flips the lever in the opposite direction, engaging the opposite pin (or jewel) with the cog, and the cycle repeats. ... The oscillatory motion of the watch causes the laser spot on the wall to move back and forth along a line (vide infra).so, my school's are correct
Oscillatory motion is a type of periodic motion in which an object moves back and forth around a central position.
Let's analyze each case:
1. A diving board when used by a diver – This undergoes oscillatory motion as it moves up and down after being pressed. 
2. The motion of the balance wheel of a wristwatch – This is a classic example of oscillatory motion, as it swings back and forth in a periodic manner.
3. The motion of the turntable of a record player – This is rotational motion, not oscillatory. 
4. The motion of the center of a ten kobo piece as it rolls down an inclined plane – This is translational motion, not oscillatory.
5. The motion of the needle of a D.C. ammeter into which a low A.C. current is passed – The needle oscillates back and forth due to the alternating nature of the current.
From the options, the correct answer is:
D. i, ii, and v
motion repeating itself is referred to as periodic or oscillatory motion. An object in such motion oscillates about an equilibrium position due to a restoring force or torque. ... This motion is important to study many phenomena including electromagnetic waves, alternating current circuits, and molecules.
the motion of a needle of a DC ammeter into which a low AC current is passed, what motion does it exhibit
However, the oscillation of a diving board is a damped oscillation.
This is to ensure that the diving board would stop oscillating in a shorter period of time so as to allow the next person to step onto the diving board as safely as possibl
The answer is E .Now I will have to choose the wrong answer in cbt so that my score will increase 🤣
