Question

Angular speed of hour hand of a clock in degree per second is ______.

Options

• `1/30`

• `1/60`

• `1/120`

• `1/720`

Answer 1

Angular speed of hour hand of a clock in degree per second is `underlinebb(1/120)`.

Explanation:

Total displacement of hour hand of a clock

θ = 2π = 360° (∵ π = 180°)

Time required for this displacement,

t = 12 × 3600 s

So, angular speed, ω = `theta/"t"`

= `360/(12xx3600)`

= `1/120` degree/s