Question

EXERCISE 22 (A)
1. The sum of the digits of a two-digit number is 9. The number is 6 times the units digit. Find the number
2. The sum of the digits of a two-digit number in
nowy mumhor increased by​

Answer 1

Step-by-step explanation:

Answer:

Angular acceleration = 10 π rad/s²

Explanation:

Given:

Initial angular velocity = 0 rad/s

Final angular velocity = 600 revolutions/minute

Time taken = 2 seconds

To Find:

Angular acceleration of the rod

Solution:

Converting angular velocity from rev/min to rad/s

We know,

600 rev/min = 2 π/60 × 600

= π/30 × 600

= 20 π rad/s

Now by the first equation of kinematics we know that,

\tt \boxed{\omega _f = \omega _i +\alpha \times t}

ω

f

=ω

i

+α×t

where \tt \omega_fω

f

= final angular velocity

\tt \omega_iω

i

= initial angular velocity

\tt \alphaα = angular acceleration

t = time taken.

Substituting the data we get,

20 π = 0 + α × 2

α = 20 π/2

α = 10 π rad/s²

Hence the angular acceleration of the rod is 10 π rad/s².