Ch 1 Science: Describing Motion

When a car slows down at a traffic light it is ____________.

• accelerating

• traveling at constant velocity

• decreasing its displacement

• changing direction

Which of the following is the best object to use as a point of reference for describing the location of the parked car in the picture?

• the bird

• the store

• the street light

• the tree

Which of the following sets of directions is the most specific?

• Rio City is across the river from here.

• Rio City is about 25km from here.

• Rio City is 25km Southwest of here.

• Rio City is two hills over from the hill that is southwest of here.

A starting point that can be used to locate a place or thing is a _____ point.

• dimension

• position

• motion

• reference

Which of the following best describes how constant velocity is shown in a speed-time graph?

• a straight horizontal line

• a line curving down

• a line curving up

• a straight diagonal line

Which statement best describes the graph pictured?

• the speed is zero and does not change

• the speed of the object increases at a steady rate over time

• the speed of the object decreases at a steady rate over time

• the speed of the object increases and decreases over a given amount of time

The distance traveled divided by time taken to travel the distance is ____________.

• average speed

• mass

• momentum

• speed

Acceleration is a change in __________.

• speed

• velocity

• displacement

• position

Traveling one block west on Berry Avenue and one block north on 1st street will get Abby to school. Where would her reference point be?

• Tree on 3rd Drew Ave.

• School on 4th St. and Drew Ave.

• Park on 2nd St. and Cook Ave.

• House on 1st St. and Cook Ave.

You hear that a storm is moving 15 km/h North. You have been given the storm's _____.

• constant speed

• acceleration

• velocity

• average speed