1Which statement correctly applies to a car that changes its velocity over a period of time? aThe combination of all forces acting on it is zero.
bNo net force is acting on it.
cA nonzero net force is acting on it.
dForces are acting on it.

2A group of students conducted several trials of an experiment to study forces and the acceleration they produce on a given object. The students decided to present the resulting data using a graph rather than a table. Which statement describes an advantage of presenting the data using a graph
a
Graphs visually show the relationship between the variables under investigation.
b
Tables cannot explicitly show the data from the investigation.
c
Graphs are more appealing than tables.
d
Tables with many rows of data are not very useful.