Physics Motion Quiz 05

Two radio-controlled cars move in one direction down a track. At each second, the cars spray a paint dot on the track to mark their position. The top-down view of the track is shown along with the position readings along the track. Which car had the highest average speed for its 5-second trip and why?

• Car 1; it is moving faster at the 2.5 second point.

• Car 1; it moves faster for more seconds.

• Car 2; it finishes further down the track.

• Car 2; it moves very fast in the last two seconds.

• Both are the same; they travel the same distance.

Tags

NGSS.MS-PS3-1

A baseball pitcher throws a fastball at 42 m/s. If the batter is 18 m from the pitcher, approximately how much time does it take for the ball to reach the batter?

• 0.43 s

• 0.86 s

• 1.9 s

• 2.3 s

A race car driver travels at 110 meters per second for 20 seconds. How far did the driver travel during the 20-second time interval?

• 1,100 kilometers

• 2,200 kilometers

• 1.1 kilometers

• 2.2 kilometers

A salesperson drives the 215 miles from New York City to Washington, DC, in 4.5 hours. What was her average speed? (Round to the nearest whole number. Do not include units.)

An automobile travels between the 100-m and 250-m markers on a highway in 10 s. The average velocity of the automobile during this interval is:

• 10 m/s.

• 15 m/s.

• 25 m/s.

• 40 m/s.

You run from your house to a friend's house that is 3 miles away in 30 minutes. You then immediately walk home, taking 1 hour on your return trip. What was your average speed in miles per hour for the entire trip? (Write the number without units.)

You run from your house to a friend's house that is 3 miles away in 30 minutes. You then immediately walk home, taking 1 hour on your return trip. What was your average velocity in miles per hour for the entire trip? (Write the number without units.)

Consider the following Position vs. Time graph which represents the relationship between position and time for an object during the time interval shown. During which interval was the object at rest?

• A-B only

• B-C only

• C-D only

• A-B and C-D

The Position vs. Time graph for an automobile is shown below. Which reason below might best explain the automobile’s change in motion at point X?

• the automobile slowed down

• the automobile sped up

• the road was no longer straight

• the road became less steep

Tags

NGSS.MS-PS2-2

What is the average speed of the object for the time interval from 1 minute to 5 minutes?

• 0.75 m/min

• 1.00 m/min

• 1.25 m/min

• 3.00 m/min

Tags

NGSS.MS-PS3-1