Can the speed of a body be negative?

The displacement of a moving object in a given interval of time is zero. Would the distance travelled by the object also be zero? Justify your answer.

What is the difference between uniform motion in a straight line and uniform circular motion?

What type of motion is represented by the following graphs?

An object is dropped from rest at a height of $150 \, m$ and simultaneously another object is dropped from rest at a height of $100 \, m$. What is the difference in their heights after $2 \, s$ if both objects drop with the same acceleration? How does the difference in heights vary with time?

Draw a diagram to show the motion of a body whose speed remains constant but velocity continuously changes.