O Level Physics - Chapter 1 Questions O Level Physics - Chapter 1: Motion, Forces and Energy 1.1 Physical Quantities and Measurement Techniques Define scalar and vector quantities with examples. What is meant by base quantities? List any four. Describe the use of vernier calipers and micrometer screw gauge. Explain how to measure the volume of an irregular object using a measuring cylinder. A student records a length as 7.45 cm. What is the precision of the measuring instrument? Describe how to reduce parallax error while reading a scale. What are systematic and random errors? Give examples. 1.2 Motion Define speed, velocity, and acceleration with their units. Differentiate between uniform and non-uniform motion. Draw and explain a velocity–time graph for constant acceleration. A cyclist moves 300 m in 30 s. What is his speed? A car accelerates...