A spacecraft is travelling at a constant velocity in deep space. Active thrusters are fired, applying a non-zero resultant force to the spacecraft.

(i) State two different changes to the motion of the spacecraft that this resultant force can cause.

(ii) If a similar force is applied to a stationary rubber block resting on a kitchen counter, state one way, other than motion, in which the block can be affected.

Describe how a uniform metre rule, a pivot, and a selection of standard weights can be used in a school laboratory to verify the principle of moments (that for an object in equilibrium, the sum of clockwise moments equals the sum of anticlockwise moments).