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Physics

Why do older people often need reading glasses?

As people age, the lens becomes less flexible, and the ciliary muscles weaken, reducing the eye's ability to focus on nearby objects. This condition is called presbyopia, and it is corrected using reading glasses or bifocals.

Why do older people often need reading glasses?2024-10-18T05:37:05+05:30

How can acceleration be measured?

Acceleration can be measured using an accelerometer or by calculating the change in velocity over time using speed-measuring devices.

How can acceleration be measured?2024-09-11T01:08:46+05:30

How does gravity affect acceleration?

Gravity is a type of acceleration, specifically 9.8 m/s² downward near Earth's surface, affecting all objects in free fall.

How does gravity affect acceleration?2024-09-11T01:08:20+05:30

What is uniform acceleration?

Uniform acceleration occurs when an object’s velocity changes by the same amount in equal intervals of time.

What is uniform acceleration?2024-09-11T01:07:07+05:30

What is negative acceleration?

Negative acceleration (or deceleration) occurs when an object slows down, meaning its velocity decreases over time.

What is negative acceleration?2024-09-11T01:06:44+05:30

Can an object have acceleration if its speed is constant?

Yes, an object can have acceleration even if its speed is constant, as in the case of centripetal acceleration, where only the direction of velocity changes (e.g., circular motion).

Can an object have acceleration if its speed is constant?2024-09-11T01:06:16+05:30

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