Exam 2 Study Guide

How can you use a graph to calculate the speed of an object?

• By calculating the slope of the line

• By calculating the square root of the line

• By multiplying distance and time

• By dividing speed and distance

Tags

NGSS.MS-PS3-1

If a graph is a straight horizontal line, what can you infer about the motion of the object?

• The object is speeding up

• The object has no motion

• The object is slowing down at a steady rate

• The object is moving at a constant speed

PJ likes to ride his bike around the block. If he rides out of his house west, the sidewalk circles his block, and brings him back to his doorstep 0.35 miles later. Find his Distance AND Displacement.

• a) Distance = 0.35 miles, Displacement = 0 miles

• b) Distance = 0 miles, Displacement = 0.35 miles

• c) Distance = 0.35 miles, Displacement = 0.35 miles

• d) Distance = 0 miles, Displacement = 0 miles

Kai swims for the school swim team. He specializes in the backstroke event where he has to swim the 50m length of the pool 4 times. At the end of a race, what would Kai’s distance AND displacement be?

• a) Distance = 200m, Displacement = 0m

• b) Distance = 200m, Displacement = 50m

• c) Distance = 100m, Displacement = 0m

• d) Distance = 100m, Displacement = 50m

A car is traveling 400m in 20 seconds. How fast is the car going?

• 10 m/s

• 15 m/s

• 20 m/s

• 25 m/s

It takes Serina 0.25 hours to drive to school. Her route is 16km. What is Serina’s average speed on her drive to school?

• 64 km/h

• 32 km/h

• 16 km/h

• 8 km/h

In a competition, an athlete threw a discus 139 meters through the air before it landed. While in the air, the discus traveled at an average speed of 13.0m/s. How long was the discus in the air?

• 10.7 seconds

• 12.5 seconds

• 13.5 seconds

• 14.0 seconds

You need to get to class 200 meters away, and you can only walk in the halls at about 1.5 m/s or you will be caught. How long will it take you to get to class?

• 100 seconds

• 133.33 seconds

• 150 seconds

• 200 seconds

If you shout into the Grand Canyon, your voice travels at the speed of sound (340m/s) to the bottom of the canyon and back, and you hear an echo. How deep is the canyon if it takes you 5.2 seconds to hear the echo after you shout?

• 884 meters

• 680 meters

• 1020 meters

• 750 meters

Tags

NGSS.MS-PS4-2

You must use the Pythagorean theorem to find displacement if the object travels in a...

• Right angle

• Obtuse angle

• Acute Angle

• 180 degree angle