The 6.50-cm-long second hand on a watch rotates smoothly.What is its angular velocity?What is the speed of the tip of the hand?

1 answer:

maks197457 [2]3 years ago

6 0

The seconds hand of a clock completes one full revolution around
the face of the clock every minute.

One full revolution = 360 degrees.

The hand revolves (360 degrees / 60 seconds) = 6 degrees per second.

The tip of the hand travels in a circle, and covers the circumference
of the circle every minute. The circumference of a circle is

(2π) x (radius of the circle).

The length of the hand is the radius of the circle that it travels in,
so the circumference of the circle is

(2π) x (6.5 cm) centimeters.

The tip of the hand covers this distance in 60 seconds,
so its speed is

(13π cm) / (60 seconds) = 0.681 cm/sec.

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pickupchik [31]

Answer:

T = 0.607 seconds

Explanation:

Given:

Mass, M = 1.50 × 10⁻² kg

Radius, R = 5.50 × 10⁻² m

Now,