1. A weight of 6 N is located 10 cm from the fulcrum of a simple balance beam. What weight should be placed at a point 5 cm from the fulcrum on the opposite side in order to balance the system?

(a) 8 N (b) 16 N (c) 12 N (d) 15 N.

2. A net torque of 6 Nm is applied to a disk with a rotational inertia of 2 kgm². What is the rotational acceleration of the disk?

(a) 3 rad/s² (b) 4 rad/s² (c) 8 rad/s² (d) 12 rad/s²