STAAR Review: Changes in Motion

A motorcycle traveling 35 mi/hr slows as it approaches a stop sign. This is an example of _____ (8.6B)

• acceleration

• distance

• speed

• velocity

Tags

NGSS.MS-PS2-2

A bike racer travels 17 mi/hr in a South direction. This is an example of -- (8.6B)

• distance

• speed

• velocity

• acceleration

Which graph best represents a car traveling down the freeway at a constant speed? (6.8D)

• a

• b

• c

• d

Tags

NGSS.MS-PS3-1

Javelinas need strong leg muscles to help provide enough force for them to accelerate to high speeds. This fast movement can help Javelinas escape from predators and reach the safety of the pack. If a Javelina runs 42 meters in 6 seconds, what is its average speed? (6.8C)

• 6 m/s

• 7 m/s

• 48 m/s

• 252 m/s

What is the difference between the velocity and the speed of an object? --8.6B

• Velocity is the change in distance over time, while speed is the change in velocity overtime.

• Velocity has a direction associated with it, while speed has no specific direction

• Velocity has no direction associated with it, while speed has a specific direction.

• Velocity is the change in speed over time, while speed is the change in distance over time.

A hobbyist collected data about the motion of a toy train on a straight track and then recorded the data in the graph below.

Which of these accurately describes the motion of the toy train? -- 6.8D

• The toy train speeds up while going forward and then slows down.

• The toy train slows down while going forward and then moves backward.

• The toy train moves forward at a constant speed, slows down, and then stops.

• The toy train moves forward at an increasing speed, stops, and then moves forward.

Tags

NGSS.MS-PS3-1

Some students were investigating the speed of a toy car they built. They performed two trials and recorded their data in the tables shown.

What was the average speed of the toy car during the two trials to the nearest tenth of a m/s? -- 6.8C

• 9.0 m/s

• 12.6 m/s

• 1.4 m/s

• 1.0 m/s

The three vehicles shown above are all traveling at a speed of 15m/s, but only the pickup truck has a changing velocity. The pickup truck has a changing velocity because the pickup truck — (8.6B)

• can accelerate faster than the other two vehicles

• is traveling in the opposite direction from the other t

• is traveling on a curve in the road

• needs a large amount of force to move

A block is pulled 0.90 m to the right in 2.5 s. What is the block’s average speed to the nearest hundredth of a m/s? -- 6.8C

• 2.25 m/s

• 0.36 m/s

• 1.60 m/s

• 0.50 m/s

Tags

NGSS.MS-PS3-1

Which of these situations could be represented by this graph of distance over time?-- 6.8D

• A student walks 1.5 km to a friend’s house in 40 minutes. The two students then walk another 1.5 km to school in 20 minutes.

• A student walks 1.5 km to a friend’s house in 30 minutes. The two students then walk another 1.5 km to school in 30 minutes

• A student walks 1.5 km to a friend’s house in 20 minutes. The two students then walk another 1.5 km to school in 40 minutes.

• A student walks 1.5 km to a friend’s house in 20 minutes. The two students then walk another 1.5 km to school in 60 minutes.