Science 10 Physics

23 km= m

• 23000

• 2300

• 0.23

• 230

How many significant figures does the following have, 1000.0

• 1

• 2

• 4

• 5

Average speed can best be defined as:

• the speed at which an object is traveling at a particular time.

• an object traveling at the same speed over a period of time.

• the total distance covered over the total time measured

• the rate of change in speed

Instantaneous speed can be best defined as

• the speed at which an object is traveling at a particular instant.

• an object traveling at the same speed over a period of time

• the total distance covered over the total time measured.

• the rate of change in speed.

An example of negative acceleration is

• a car traveling at an event increasing speed.

• a car stopped.

• a car turning a U ball

• a car coming to a traffic light and slowing uniformly to a stop.

line showing being stopped is

• A-B

• C-D

• D-E

• E-F

The line on the graph showing constant speed is

• A-B

• B-C

• D-E

• E-F

A steep slope on a distance-time graph indicates:

• The object is not moving

• the object's speed is increasing

• The object has a low speed.

• The object has a high speed.

William competes in a marathon race and does not win. If the length of the race increases and his time remains the same, what happens to his average speed?

• His average speed remains the same.

• His average speed increases.

• His average speed decreases.

• You cannot tell from the data given.

The slope of the best-fit line on a speed-time graph will determine the

• change in position over a period of time

• change in speed over a period of time

• same position over a period of time

• time it takes for an object to go from position 1 to position 2.