motion

Multiple Choice

in physics, the rate at which the speed of a moving object changes over time

• Acceleration

• Force

• Speed

• Work

Multiple Choice

Jerry walked from home to school, then from the school to the park. What is his total distance?

• 2 km

• 5 km

• 8 km

• 10 km

Multiple Choice

which 1 is not physical science classroom protocol (rules)

• pull up agenda b4 sitting down

• complete all study.com vids in ch in order to receive ANY credit

• tric time off choppin it up wit ya folks bout anything else ota than that work

• get right on your notebook by finishing up reading assignments

Multiple Choice

After completing one trip on a roller coaster, the roller coaster's ________ is zero.

• displacement
• reference point
• length
• distance

Multiple Choice

A place or object used for comparison to determine if another object is in motion is called a

• comparison point
• reference point
• point of view
• motion detector

Multiple Choice

What does this graph represent?

• Constant Speed
• Acceleration
• Not moving

Multiple Choice

What does this graph represent?

• Constant speed
• Acceleration
• Not moving

Multiple Choice

What two measurements are necessary for calculating speed?

• Mass and time
• Temperature and mass
• Mass and distance
• Distance and time

Multiple Choice

Which graph BEST represents the motion of an object that was initially at rest and is accelerating uniformly?

Multiple Choice

Relative motion

• the motion of an object in comparison to other objects in a specific frame of reference

• the point of view used to measure the position and movement of objects

• how fast something moves

• the distance

Multiple Choice

If you are solving for the distance, you would calculate the...

• time divided by speed

• speed divided by time

• speed multiplied by time

• distance multiplied by speed

Multiple Choice

Based on the UNITS given, which of the following would be a correct answer for finding the SPEED.

• S = 4 miles

• S = 4 minutes

• S = 4 min/miles

• S = 4 miles/min

Multiple Choice

Which of the following could be an answer if solving for the distance?

• d = 4 seconds

• d = 4 meters/second

• d = 4 seconds/meters

• d = 4 meters

Multiple Choice

If Harry drives 4 miles in 2 minutes, what was his speed?

• 0.5 miles/min

• 2 miles/min

• 2 min/m

• 0.5 min/m

Multiple Choice

If Sally is speeding through the parking lot at 18m/hr, and she travels 9 m, how long did it take her?

• 2 m/hr

• 0.5 hr

• 2 m

• 0.5 m

Multiple Choice

If Emma is running for 8 minutes at 2 miles/min, how far did she run?

• 4 miles

• 16 min

• 16 miles

• 0.5 min

Multiple Choice

In order to find the Time, you must

• divide the distance by the speed (distance/speed)

• multiply the distance by the speed (distance/speed)

• Neither of the Above

Key idea

A conversion factor is a rate that equals 1

converting units

2.) Convert 20 cm to inches ( 1 in = 2.54 cm)

​

​

Remember that using dimensional analysis, you have to use the "railroad tracks" to show the different conversions.

o You can look these up now, but on a test I will provide resources

Multiple Choice

Which of these would best fit in the box?

^{Member- How would you write the conversion factor so that unit U want to cancel out does so?}

• 60 min

• 1 day

• 4 hrs

• 1 hr

Multiple Choice

Which of these would be the appropriate unit in the box?

^{all bout writing it out so that U cancel out units U trna get rid of, right.}

• 2 hours

• 1 day

• 1 hour

• 1 min

• Used to change measurements to the correct unit.

• When converting si units by prefixes, factors of 10 are used.

• When changing between metric and you may use other known conversion factors

Ex: 1 dozen = 12 ; 1 kg = 1000 g

Dimensional Analysis​

Multiple Choice

Is there anything wrong with the dimensional analysis set up yes or no and why?

• yes, you have to have days in the denominator in the 2nd column to cancel with days in the first

• no, at the end of the dimensional analysis you will have days² which is very helpful

• no, in this set up the days cancel every time

• yes, minutes will cancel with days easily with days in the numerator

Multiple Choice

If the proper conversion is 2.2 lbs = 1 kg, then what should go in the empty box?

• 2.2 lbs

• 1000 g

• 2.2

• 1 bs

Fill in the Blanks

Multiple Choice

Convert 20 m/sec into km/hr.

• 72 km/hr

• 129.6 km/hr

Multiple Choice

Convert 72 km/hr  into m/sec

• 72 m/s

• 129.6 m/sec

• 20 m/sec 

changing units

How many liters does the human heart pump per minute? The human hear pumps 5 quarts of blood per minute.

​(1 qt = 0.95 L)

changing BOTH units

You are riding on a zip line. Your speed is 15 miles per hour. What is your speed in feet per second? You will need to make two conversions

(1 mi= 5,280 ft) (1 hr = 3,600 sec)

•What is the objects distance at 4 seconds of travel?

• How long has the object been traveling when it is at 6m?

• How many seconds is the object at 5m?

• How many seconds does it take the object to go from 0 to 5 m?

Practice Reading a Graph:

Multiple Choice

Describe the object's motion from B to C:

• Speeding Up

• Slowing Down

• Constant Speed

• Not Moving

Conversions

​34.5 meters to kilometers

Conversions

​34.5 meters to kilometers

0.0345 km

Multiple Choice

Convert 62 miles/hour to feet/second. (5,280 ft = 1 mi)

• 5,456 ft/s

• .003 ft/s

• 91 ft/s

• 909 ft/s

• Used to change measurements to the correct unit.

• When converting si units by prefixes, factors of 10 are used.

• When changing between metric and you may use other known conversion factors

Ex: 1 dozen = 12 ; 1 kg = 1000 g

Dimensional Analysis​

Multiple Choice

60 Inches to Feet

(12 inches = 1 foot

• 720 feet

• 5 inches

• 5 feet

• 72 feet

Multiple Choice

How many inches are in 1 mile?

(5280 ft = 1 mile)

• 66330 in

• 63660 in

• 63360 in

• 63066 in

Multiple Choice

What is acceleration?

• an increase in speed

• a decrease in speed

• a change in direction

• all of these are examples

Multiple Choice

Acceleration is just when an object speeds up?

• True, only objects speeding up is acceleration

• False, objects speeding up and slowing down is acceleration.

Multiple Choice

Natalie drops her skateboard into a bowl speeding up from 0 m/s to 4 m/s in 2.5 s. What is her average acceleration?

• 4 m/s

• 1.6 m/s/s

• 1.6 m

• 2.5 m/s/s

Multiple Choice

A car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.

• 2.2m/s²
• 7.0m/s²
• 5.7m/s²
• 70m/s²

Multiple Choice

Which of the following is a unit for acceleration?

• km/s

• m/s²

• m/hr

• m/s

Memorize the graph shapes and then you can read distance/time graph you have on a quiz or test.

Multiple Choice

Describe the object's motion from B to C:

• Speeding Up

• Slowing Down

• Constant Speed

• Not Moving

Multiple Choice

Describe the object's motion from C to D:

• Speeding Up

• Slowing Down

• Constant Speed

• Not Moving

Multiple Choice

Describe the object's motion from D to E:

• Speeding Up

• Slowing Down

• Constant Speed

• Not Moving

Multiple Choice

Match the description to the graph:

"The car is stopped."

Multiple Choice

Match the description to the graph:

"The car is traveling at a constant speed."

Multiple Choice

Segment A-B The bus is _________________.

• at rest

• returning (to original position)

• moving forward

Multiple Choice

Segment O-A The bus is _________________.

• at rest

• returning (to original position)

• moving forward

Multiple Choice

Which runner won the race?

• Albert

• Bob

• Charlie

RECALL

• speed is the rate of change of motion (distance or a set amount of time)

• velocity includes the speed and the direction of an object

  • Acceleration occurs when an object changes its speed, direction, or both.

    • So acceleration occurs when velocity changes

Velocity and Acceleration

​These graphs are used when an object travels in a straight line and does NOT change direction.

• ​line A = acceleration (speeding up)

• line B = moving at a constant velocity (no change in speed)​

• line C = decelerating (slowing down)​

Speed-Time Graphs and Acceleration

​

​A

​B

​C