8.6B Speed, Velocity, Acceleration

Which example does NOT show acceleration of an object?

• A car turning at 20 km/h

• A person walking a constant speed of 5 km/h

• A car speeding up on the freeway

• A mosquito crashing into a windshield

Which change to speed would convert a speed measurement to velocity?

• Adding direction

• Slowing down

• Speeding up

• Maintaining constant speed

Which statement describes the velocity of the apple?

• The apple moved a distance of 6 meters in 3 seconds

• The velocity of the apple was constant at 2 m/s

• The speed of the apple did not change

• The apple fell in a downward motion at an average speed of 2 m/s

A car traveling 50 km/hour slows to a stop, turns right, and then gradually resumes its original speed in 60 seconds. This could best be described as a change in

• speed

• velocity

• acceleration

• speed, velocity and acceleration

Tags

NGSS.MS-PS2-2

Two students were given warm-up instructions in physical education class. At what point did the students' velocities change due to direction?

• Point 1

• Point 2

• Point 3

• Point 4

An athlete goes for a run. The athlete runs 5 kilometers per hour, then makes a right-hand turn, and his speed changes to 8 kilometers per hour. Which statement best describes the athlete's run?

• The athlete experienced a decrease in acceleration

• The athlete experienced no acceleration

• The athlete experienced an increase in acceleration

• The athlete experienced an increase in speed but experienced no acceleration

Tags

NGSS.MS-PS3-5

A student collects data while walking to school one morning. The student uses a timing device to time how long it takes to walk to school and a pedometer to measure the distance walked. With the data collected, the student can calculate

• acceleration

• speed

• velocity

• Not here

Tags

NGSS.MS-PS3-1

How can values for velocity and acceleration be distinguished?

• Velocity is change in position over time Acceleration is change in speed over time

• Velocity is change in speed over time. Acceleration is change in position over time

• Velocity is change in speed divided by change in time. Acceleration is speed with direction

• Velocity is speed with direction. Acceleration is change in velocity over time

Four students measure acceleration during an investigation, but the data does not include the appropriate units. Which student correctly identifies the unit for acceleration?

• Student A - m/s

• Student B - s²

• Student C - m/s²

• Student D - m²

A family takes a trip from Austin, Texas, to Houston, Texas. All of the following are possible velocity values for the family's trip, EXCEPT

• the velocity for the trip is 103 km/h

• the velocity for the trip is 103 km/h southeast

• the velocity for the trip is 121 km/h southeast

• the velocity for the trip is 89 km/h southeast