Quiz, s/t-graphs

Hint

Don’t forget a space between the magnitude and the unit.

Hint

• The velocity at a particular point is the same as the slope of the line in an s/t-graph.
• Don’t forget that we are moving in a negative direction, i.e. closer and closer to the origin.

Hint

Rememberer that speed is a scalar, i.e. just a number without any direction indication. The velocity 2 m/s and -2 m/s does both correspond to the speed 2 m/s.

Hint

• What position did the object have initially?
• What is the position at t=4 S?
• So how far have it moved?

Hint

In what direction did we move?

Hint

• Does the object move at all?
• Don’t forget the unit.

Hint

• velocity =change of position / change in time.
• The velocity at a point along a straight line in an s/t graph = the average velocity  over the line = the slope of the line.

Hint

Add all the distances.