DA 1 Review

Two students are working together to build a birdhouse. Student 1 applies a force of 10 N to a wooden board in order to slide it across the table to Student 2.  
If the force of friction resisting the student’s push is 4 N, what is the net force acting on the board? 

• 4 N
• 6 N
• 10 N
• 14 N

The graph below shows the motion of a ball rolling on a straight track. 
What was the ball’s average speed during the time represented in the graph? 

• .2 m/s
• .5 m/s
• 5.0 m/s
• 10.0 m/s

 The list includes six situations. 
• A book sliding across a table at a constant speed
• A ball sitting on a shelf
• A can rolling down a ramp
• A swing moving back and forth
• A car traveling at a constant speed of 15 m/s
• A bird landing on a branch 
Which objects in the list experience an unbalanced force? 

• The book, the ball, and the car 
• The ball, the car, and the bird 
• The can, the swing, and the bird 
• The book, the ball, the can, and the swing 

Deep Space 1 was a spacecraft powered by an engine that gave off xenon particles to change velocity. It had a mass of 500 kg. Which expression can be used to find the spacecraft’s acceleration if its engine created a net force of 0.10 N? 

• .10N / 500 kg
• 500 kg x 0.10 N    
• 500 kg / .10 N
•  500 kg + 0.10 N  

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

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

Four students were asked to name the parts of an atom that determine the atom’s identity and chemical properties. The students’ responses are shown in the table below. 

• Student 1
• Student 2
• Student 3
• Student 4

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? 

• 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. 

See the image for the question.

• 2
• 3
• 4
• 8

During a lab investigation, students added four 50 g masses to two boxes and arranged the boxes so that they were motionless on a pulley, as shown in the diagram. The students then followed the procedure described in the box. The students recorded their observations after each procedure and reset the pulley system to the original conditions. 

• Procedures 1, 2, and 3 
• Procedures 4 and 5 
• Procedures 3 and 4 
• Procedures 1, 3, and 5 

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

• Activity 3 required more work than Activity 1, but Activity 3 did not require more work than Activity 2. 
• Activity 1 required the same amount of work as Activity 3. 
• Activity 2 required the most work. 
• Activity 1 was the only activity that required work.