Topic explanation

Standard explanation

Motion speeds up when v and a have the same sign and slows when their signs differ.

Key points

• Speeding up and slowing down
• rule
• worked example
• Speeding up and slowing down: Motion speeds up when v and a have the same sign and slows when their signs differ.
• CONCEPT AND RULE: Motion speeds up when v and a have the same sign and slows when their signs differ.
• METHOD: For speeding up and slowing down, identify the given information and required result. Select the mat
• Motion speeds up when v and a have the same sign and slows when their signs differ.
• Worked pattern: If v<0 and a<0, speed increases.

Labelled diagram