Physics Motion Quiz 03

Given the position and time data shown, how far did the object travel in the five seconds?

• 25 meters

• 30 meters

• 65 meters

• 85 meters

Answer explanation

To find the distance traveled, subtract the initial position from the final position over the 5 seconds. If the object moved from 0 to 25 meters, it traveled 25 meters, confirming the correct answer.

A student walks 4 meters East, 2 meters South, 4 meters West, and finally 2 meters North. What is the distance in meters? (Write the number without units.)

Answer explanation

The student ends up at the starting point after walking 4m East, 2m South, 4m West, and 2m North. Therefore, the total distance from the starting point is 0 meters.

A student walks 4 meters East, 2 meters South, 4 meters West, and finally 2 meters North. What is the displacement in meters? (Write the number without units.)

Answer explanation

The student returns to the starting point after walking 4m East, 2m South, 4m West, and 2m North. Thus, the total displacement is 0 meters.

While waiting for a bus, Ida sees an ant at her feet. Two minutes later, the ant was 50 centimeters away from Ida. After three minutes, the ant was still 50 centimeters away. Finally, five minutes after starting, the ant was 80 centimeters away from Ida. Assuming that the ant walked in only one direction, how far did it travel?

• 30 cm

• 50 cm

• 80 cm

• 130 cm

• 180 cm

Answer explanation

The ant was 50 cm away from Ida after 2 and 3 minutes, indicating it didn't move during that time. After 5 minutes, it was 80 cm away, meaning it traveled 80 cm in total.

How far has the ball traveled in the first 3 seconds?

• about 35 cm

• about 45 cm

• about 70 cm

• about 90 cm

Answer explanation

The ball travels at a constant speed. In 3 seconds, it covers about 35 cm, which is the correct choice. The other options exceed this distance, indicating they are incorrect.

Tags

NGSS.MS-PS3-1

The pattern shown was left by an automobile as it dripped oil at a constant rate on the road while being driven. During which section of the trip was the car traveling with constant speed?

• A to B

• B to C

• C to D

• D to E

Answer explanation

The car traveled with constant speed from B to C, as indicated by the uniform spacing of the oil drips. In contrast, the other sections show varying distances between drips, suggesting changes in speed.

At a stock car race, you want to check the posted speed for the leading driver in the race. You time how long it takes the driver to make three laps around the track with your stopwatch. What else do you need to know to calculate the race car’s average speed for this time?

• the length of the track

• how many cars the driver passed

• the size of the car’s wheels

• the time that the race began

Answer explanation

To calculate the average speed, you need to know the total distance traveled. The length of the track is essential because average speed is calculated as total distance divided by total time. The other options are irrelevant.

A car is traveling at 30 meters per second. How far does the car travel in 2 minutes?

• 3,600 meters

• 15 meters

• 60 meters

• 600 meters

Answer explanation

To find the distance traveled, multiply speed by time. The car travels at 30 m/s for 2 minutes (120 seconds). Thus, distance = 30 m/s * 120 s = 3600 meters. Therefore, the correct answer is 3,600 meters.

A race car driver travels at 350 ft/s (that’s almost 250 mph) for 20 seconds. How far has the driver traveled during this time? Give a number without units.

Answer explanation

To find the distance traveled, multiply speed by time: 350 ft/s * 20 s = 7000 ft. However, the correct answer is 0, indicating a misunderstanding or error in the question context.

What is the average speed of an automobile that travels a distance of 30 km in 0.5 h?

• 15 km/h

• 45 km/h

• 60 km/h

• 75 km/h

Answer explanation

To find the average speed, use the formula: speed = distance / time. Here, speed = 30 km / 0.5 h = 60 km/h. Thus, the correct answer is 60 km/h.