A plane mirror is fixed to the suspension of moving coil galvanometer with a sensitivity of 5° per micro-amp. A beam of light incident on the mirror is reflected on to a scale 3m away. Calculate the movement of the spot of light on the scale if a current of 0.8A

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.