If the graph represents speed what is measured on the x and y axes

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving