Please solve mcqs

Qno1 . A sanding disk with rotational inertia 9.0x 103 kg-m is attached to an electric drill whose motor delivers a torque of magnitude 43 N-m about the central axis of the disk. About that axis and with torque applied for 52 ms, what is the magnitude of the (a) angular momentum and (b) angular velocity of the disk?

a) numbers (?) Units (?)

b) numbers (?) Units(?)

2) A wheel starts from rest and has an angular acceleration that is given by a (t)-6 rad/s) The angle through which it turns in time t is given by:

a) ((1/8)trad/s

b) ([1/4]r" rad/s

c) ((1/2)trad/s

d) ((t") rad/s

c) 12rad

3) A disk, initially rotating at 144 rad/s, is slowed down with a constant angular acceleration of magnitude 3.75 rad/s. (a) How much time does the disk take to stop? (b) Through what angle (rad) does the disk rotate during that time?

a) numbers(?) Units(?)

b) numbers (?) Unjts(?)

4) Ameter stick balances horizontally on a knife- edge at the 50.0 cm mark. With two 6.01 g coins stacked over the 25.6 cm mark, the stick is found to balance at the 36.9 cm mark. What is the mass of the meter stick?

a) numbers(?) Units(?)

Please solve all