Motion; class participat'n

Which of the following is TRUE?

• to get distance you divide speed by time

• to get distance you divide time by speed

• to get distance you multiply speed and time

• to get speed you multiply distance and time

How many of the following 8 are units for SPEED?

cm/s2 m/s km/hr2 kilometers

seconds km/day mi/hr m/hr

• 1

• 2

• 3

• 4

Which of the following is TRUE?

• to get hours from seconds you divide by 60

• to get hours from seconds you multiply by 60

• to get hours from seconds you divide by 3600

• to get hours from seconds you multiply by 3600

Which of the following is NOT TRUE?

• average speed is the same as constant speed

• average speed cannot be higher than instantaneous speed

• average speed is calculated by dividing the entire distance traveled by the entire time traveled

• instantaneous speed is calculated by dividing the time it takes an object to pass by a specific point into the length of the object

An object that is at constant speed would have a speed vs. time graph that would look like/have the same trend as the objects graph for what?

• time vs. distance with no slope

• distance vs. time with no slope

• distance vs. time with positive slope

• time vs. distance with positive slope

If you conducted an experiment in which you used a car and ramp and moved ONE photogate to 4 positions along the ramp and recorded the object's time, which of the following is TRUE?

• the graph of the data could be time vs. position of photogate

• the graph of the data could be speed vs. time

• the graph of the data could be speed vs. acceleration

• the graph of the data could be acceleration vs. time

Which of the following is true regarding acceleration?

• it is the change in speed divided by a specific distance

• it is the change in speed divided by average speed

• it is the distance divided by time for the end of a trip minus the distance divided by time for the beginning of a trip divided by time

• none of these

Which of the following has the unit for the denominator squared?

• position

• distance

• speed

• acceleration

What would the patten/trend look like for an object that is accelerating on a distance vs. time graph?

• a flat, horizontal line

• a straight, positive slope

• a straight, negative slope

• a curved line moving up

Which of the following is true of a graph that is position vs. speed?

• speed is the responding variable

• speed is the manipulated variable

• speed is constant

• speed is the control