The diagram below shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformations occur when propane gas is used to lift the balloon?

Chemical --> thermal --> mechanical

Mechanical --> light --> chemical

Chmical --> mechanical --> thermal

The diagram below shows a boat moving north in a river at 3 m/s while the current in the river moves south at 1 m/s. How will the boat be affected if it enters a part of the river where the current is moving south at 2 m/s?

The boat will move to the west.

A student lets a toy car roll four times down a ramp that is 1m long. Each time the student covers the surface of the ramp with a different material. The student measures the time it takes the car to roll down the ramp and records the results in the table below. Which of these would be the best conclusion based on the data in the table?

Different surfaces affect how fast a toy car accelerates.

Different toy cars travel at different speeds.

Gravity has little effect on the speed of toy cars on different surfaces.

Air resistance is the greatest factor in limiting the acceleration of different toy cars.

When a lion eats a zebra nad then uses the energy from the zebra to run, the lion's body converts _________.

chemical energy to mechanical energy

electrical energy to chemical energy

chemical energy to light energy

mechanical energy to chemical energy

The graph below shows distance over time. Which of these situation could be represented by this graph?

A student walks 1.5 km to a friend's house in 20 minutes. The two students then walk anothe r 1.5 km to school in 40 minutes.

A student walks 1.5 km to a friend's house in 40 minutes. The two students then wak 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 60 minutes.

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

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

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

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.

The diagram shows a homemade car being pushed with a force of 25 N. The force causes the car to move at a constant speed of 3 m/s. What will happen if the force is changed to 35 N?

The speed of the car will increase.

The car will move at a constant speed of 13 m/s.

The speed of the car will not change.

The speed of the car will decrease to 1 m/s

The main parts of a working clothes dryer are shown in the diagram. This appliance dries clothes primarily by converting ________.

electrical energy to heat and mechanical energy

mechanical energy to heat and electrical energy

electrical energy to heat and light

mechanical energy to heat and vaporization

An athlete is trying to lift some weights. He successfully lifts 200 N weights, but when he tries to lift 400 N weights, he is unsuccessful. Which of these correctly compares the amount of work the athlete does on the weights?

The athlete does work on the 200 N weights but does no work on the 400 N weights.

The athlete does no work on either the 200 N weights or the 400 N weights.

The athlete does not work on the 200 N weigths but does work on the 400 N weights.

The athlete does work on both the 200 N weights and the 400 N weights.

During a demonstration of Newton's laws of motion, a student used the setup shown in Fig.1. The student flicked the index card with a fingertip, and the coin fell straight down into a plastic cup as shown in Figure 2. Which of these best explains why the coin fell straight down into the cup instead of remaining on the index card?

The coin was at rest until the card was removed, so it tended to remain in the same location. Once the card was gone, the unbalanced force of gravity caused the coin to fall.

Moving the card applied an action force on the coin. Since the card was gone, gravity applied a reaction force on the coin.

The card had less mass than the coin, so a smaller force of gravity acted on the card. The larger force of gravity on the coin made it fall.

The acceleration of the coin falling into the cup was equal and opposite to the acceleration of the card.

The diagram below shows two different forces acting on a cyclist riding a bicycle. The total mass of the cyclist and the bicycle is 100.0 kg. Based on this informtiona, what is the acceleration of the cyclist?

0.66 m/s 2 forward, because the applied force is greater than the force of the air.

0.66 m/s 2 backwards, because the force of the air slows the cyclist down.

2.3 m/s 2 backwards, because the forces are opposite and not equal.

2.3 m/s 2 forward, because the cyclist's inertia is grater than the force of the air.

The list includes six situations. Which objects in the list experience an unbalanced force?

The can, the swing, and the bird

The ball, the car, and the bird

The book, the ball, the can, and the swing

The drawing shows two identical airplanes at an air show. The airplanes are flying at the same speed. Airplane W is flying 50m higher than Airplane X. Which statement best describes the energy of the two airplanes?

The two airplanes have the same kinetic energy but different gravitational potential energies.

Airplane W has a greater kinetic energy than Airplane X.

The two airplanes have the same gravitational potential energy but different kinetic energies.

Airplane X has more gravitational potential energy than Airplane W.

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?

Teh toy train moves forward at a constant speed, slows down, then stops.

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

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

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

A clerk at a hardwar store performed the activities in the list. Which statement best describes the amount of work performed for the three activities?

Activity 2 required the most work.

Activity 3 required more work than Activity 1, but Activity did not require more work than Activity 2.

Activity 1 required the same amount of work as Activity 3.

Activity 1 was the only activity that required work.

A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?

The chemical energy stored in teh match changed to thermal energy and light energy.

The thermal energy stored in the match changed to light energy and chemical energy.

The light energy and thermal energy stored in the match changed to mechanical energy.

The light energy and thermal energy stored in teh match changed to chemical energy.

A student graphed the postion of a cart during a 7-second time interval. Which statement best describes the cart?

The cart moved at a constant velocity of 0.5 m/s for the entire 7 seconds.

The cart was stationary with a velocity of 0 m/s for the entire 7 second.

The cart was stationary except for a short burst of acceleration of 0.5 m/s 2 .

The cart accelerated at a constant rate of approximately 0.8 m/s 2.

NASA's space shuttle program was active from 1981 until 2011. The photograph shows rockets carrying a space shuttle off the launchpad. How can Newton's law of action-reaction best be applied to explain the movement of a rocket?

As the fuel burns, gases push against the rocket, moving it upward.

As the fuel burns, gases move out of the rocket and reduce air resistance.

As the fuel burns, the mass of the rocket decreases.

As the fuel burns, the rocket moves faster.

STAAR Category 2: Force, Motion, and Energy

Quiz

•

Physics

•

6th - 8th Grade

•

Practice Problem

•

Hard

•

NGSS

MS-PS2-2, MS-PS3-1, MS-PS3-5

+11

Standards-aligned

Used 48+ times

FREE Resource

48 questions

Show all answers

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

The three vehicles shown below 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 —

Can accelerate faster than the other two vehicles

is traveling in the opposite direction from the other two vehicles

is traveling on a curve in the road

needs a large amount of force to move

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Two boxes and their masses are shown below. Which of the following situations shows work being done?

A student is sitting in a chair and holding both boxes.

A student is holding the large box 1 m above the floor.

A student is standing and holding the small box.

A student is lifting the small box 0.5 m from the floor to a table.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records datat in the table below. Which of these best explains the student's data?

The speed of the cart decreases as the cart rolls down the ramp because of friction between the cart and the ramp.

The speed of the cart increases as teh cart rolls down the ramp because the force acting on the cart is greater than the the force of gravity.

The speed of the cart increases as the cart rolls down the ramp because the forces acting on the cart are unbalanced.

The speed of the cart decreases as the cart rolls down the ramp because the forces acting on the cart are balanced.

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Two cars with different masses travel at the same speed down a hill towards a stop sign. What will happen when both cars apply brakes at the same time to stop?

The car with the smaller mass will require less force to stop than the car with the larger mass.

The car with the larger mass will maintain its velocity while traveling down the hill.

The car with the smaller mass will take longer to stop than the car with the larger mass.

The car with the larger mass will have less inertia than the car with the smaller mass.

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Four students raced toy cars on a track. The mass and the acceleration of each car is recorded in the table below. Which toy car had the greatest applied force?

Tags

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

In the classroom demonstration shown below, a rubber ball is dropped from Position 1. The ball bounces as shown. At which of these positions does the ball have both the greatest kinetic energy and the least potential energy?

Position 1

Position 2

Position 3

Position 4

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which description is a correct interpretation of the graph?

A car travels at a constant speed of 15m/s for 2 minutes. The car increases its speed from15 to 25 m/s during the next minute and then travels at a constant speed of 25 m/s for 2 more minutes.

A car travels at a constant speed of 15 m/s for 2 minutes. The car decreases its speed from 15 to 25 m/s during the next minute and then travels at a constant speed of 25 m/s for 2 more minutes.

A car increases its speed from 15 to 25 m/s for the first 2 minutes then travels at a constant speed for 5 minutes then increases its speed to 30 m/s during the next 5 minutes.

A car decreases its speed from 25 to 15 m/s for the first 2 minutes then travels at a constant speed for 5 minutes then increases its speed to 30 m/s during the next 5 minutes.

Tags

NGSS.MS-PS3-1

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STAAR Category 2: Force, Motion, and Energy

48 questions

The three vehicles shown below 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 —

Two boxes and their masses are shown below. Which of the following situations shows work being done?

For an investigation, a student measures the speed of a cart as it rolls down a ramp. The student then records datat in the table below. Which of these best explains the student's data?

Two cars with different masses travel at the same speed down a hill towards a stop sign. What will happen when both cars apply brakes at the same time to stop?

Four students raced toy cars on a track. The mass and the acceleration of each car is recorded in the table below. Which toy car had the greatest applied force?

In the classroom demonstration shown below, a rubber ball is dropped from Position 1. The ball bounces as shown. At which of these positions does the ball have both the greatest kinetic energy and the least potential energy?

Which description is a correct interpretation of the graph?

A student walks 2 km in 30 minutes. What is the student's average speed in km/h?

Some students measure the acceleration of a wheeled cart being acted on by varying forces. The students record their data in the table shown above. According to the data table, how much force is acting on the cart when the students measure an acceleration of 2.6m/s2?

The diagram below shows a hot air balloon rising. Propane gas tanks are seen at the bottom of the balloon. What energy transformations occur when propane gas is used to lift the balloon?

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