Physics Benchmark Review!

Motion sensors recorded the following data about a runner during a cross-country race.  During which segment of the race did the runner have the greatest speed?

• W
• X
• Y
• Z

Two people each have a mass of 55 kg.  They are both in an elevator that has a mass of 240 kg.  When the elevator begins to move, the people and the elevator have an upward acceleration of 1.00 m/s².  What is the net force that acts on the elevator as it accelerates upwards at 1.00 m/s²? 

• 9.8 N
• 110 N
• 130 N
• 350 N

Tags

NGSS.HS-PS2-1

The center of a 910 kg satellite is 9.9 x 10⁶ m from Earth’s center.  What is the gravitational force between the satellite and Earth?

• 4.5 x 10³ N
• 3.7 x 10³ N
• 8.9 x 10³ N
• 1.7 x 10⁶ N

Tags

NGSS.HS-PS2-4

Radar works by sending out radio signals.  The reflected signals are measured and analyzed to determine some of the characteristics of the object that reflected the signals.  One type of radar emits radio signals having a wavelength of 1.5 meters.  What is the frequency of these signals?

• 1.5 x 10⁸ Hz  
• 2.0 x 10⁸ Hz
• 2.5 x 10⁸ Hz
• 3.0 x 10⁸ Hz

During a classroom activity a suction-cup dart with a mass of m was launched at a stationary cart that had a mass of 5m.  Four students observed the event, and their descriptions are shown in the table.  Which student best described the momentum, kinetic energy, and velocity of the system before and after the collision? 

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

During a classroom activity a suction-cup dart with a mass of m was launched at a stationary cart that had a mass of 5m.  Four students observed the event, and their descriptions are shown in the table.  Which student best described the momentum, kinetic energy, and velocity of the system before and after the collision? 

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

Tags

NGSS.HS-PS3-1

NGSS.HS-PS2-2

Students set up a water tray with a barrier placed halfway from the ends.  The barrier has two openings in it.  The students then generate waves that propagate toward the barrier, as shown.  As the waves travel from the left through the barrier, they produce a pattern on the right side.  In a segment of this pattern, part of the wave tends to disappear.  What phenonmenon of waves causes this pattern to occur?  

• The waves interfere with one another constructively and destructively.
• The waves refract as they travel through the openings.  
• The waves reflect back and forth as they travel through the openings.
• The waves change in frequency when they meet one another.

The diagram shows the position of a block of ice as it moves down a smooth ramp that is 1.60 m long.  Which graph best represents the motion of the block of ice on the ramp?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

A skateboarder travels back and forth on a U-shaped track during a time trial at a competition.  The graph shows the skateboarder’s speed as a function of time during the trial.  Which labeled point on the graph identifies the time during the trial that the skateboarder most likely has equal amounts of kinetic energy and potential energy?  

• P
• Q
• R
• S

A musical note has a frequency of 512 Hz.  If the wavelength of the note is 0.685 m, what is the speed of the sound of that note?

• 345 m/s
• 351 m/s
• 841 m/s  
• 0.00120 m/s

Tags

NGSS.HS-PS4-1