Ch 1 Describing Motion Test

A complete description of an object's location should include which three things?

• speed, direction, and time

• velocity, distance, and time

• reference point, speed, and distance

• reference point, distance, and direction

Which situation describes velocity?

• 2.8 m/s

• 3.5 km/s heading south

• 30 m/ $s^2$ heading north

• 5m south of the post office

which situation is NOT acceleration?

• an object speeding up

• an object slowing down

• an object moving at constant speed in one direction

• an object moving forward then moving in reverse

what does a horizontal line on distance-time graph indicate?

• an object has stopped moving

• an object that has begun to increase speed

• an object that has reached maximum speed

• an object that has reached a constant speed

the _______ is defined as the total distance traveled divided by the total time taken to travel that distance

• acceleration

• velocity

• average speed

• constant speed

Tags

NGSS.MS-PS3-1

the process of changing position is

Tags

NGSS.MS-PS2-2

the difference between the initial position and the final position of an object is its

• acceleration

• displacement

• distance

• velocity

the rate of change of position in which the same distance is traveled each second is called

• constant speed

• average speed

• acceleration

• slope of a speed-time graph

An object's ________ is its distance and direction from a reference point

Calculate the average speed of the train from minute 5 of the journey until minute 10.

• 0.83 km/min

• I cannot calculate it because the train is not moving at a constant speed

• 1.2 km/min

• 1 km/min

Answer explanation

average speed = total distance/total time.

Starting at 5 min and ending 5 minutes later (at 10 min), the train travels 6km.

Tags

NGSS.MS-PS3-1