U6: Force and Motion TEST (24-25)

Priya is walking her dog in the park. She starts 5 feet to the left of a large oak tree, walks 20 feet to the right of the tree, and ends her walk directly in front of the tree.

If negative values are assigned to positions to the left of her starting position and positive values are assigned to positions to the right of her starting position, what is the displacement of Priya? 

• -5 feet

• 20 feet

• 0 feet

• 5 feet

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• The cat began its journey in bed and ended its journey 10 meters to the right of its bed.

• The cat began its journey at its food dish and ended its journey 10 meters to the right of its bed.

• The cat began its journey in bed and ended its journey 5 meters to the left of its bed.

• The cat began its journey at its food dish and ended its journey 10 meters to the left of its bed.

Nora is walking from her home to the park. Which statement correctly classifies the concepts of distance and displacement in her journey?

• Distance is a scalar quantity, and displacement is a vector quantity.

• Distance is a vector quantity, and displacement is a scalar quantity.

• Both distance and displacement are vector quantities.

• • 
    

    Both distance and displacement are scalar quantities.

William is walking along a straight path. On a position vs. time graph, which feature would represent William moving in the negative direction over time?

• an upward-sloping line segment

• • 
    

    a vertical line segment

• • 
    

    a horizontal line segment

• a downward-sloping line segment

Two construction workers, Ava and David, are attempting to pull a slab of concrete off of the ground. Each of the workers are pulling up with a force of 225 N, while the slab of concrete applies a gravitational force of 400 N in the opposite direction, remaining stationary.

If the pulling forces applied to the slab of concrete are assigned a positive value, what is the net force of the scenario, and in which direction will the slab of concrete move?

• • 
    

    -50 N; the slab will remain stationary

• • 
    

    -175 N; the slab will remain stationary

• • 
    

    50 N; the slab will move upward

• 175 N; the slab will move upward

Tags

NGSS.MS-PS2-2

Liam places a 10 kg stone on the ground. Gravity acts on the stone at a rate of 9.8 m/s². What is the normal force acting on the stone, keeping it at rest?

• 10N

• 98N

• 1.02N

• 9.8N

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Jackson's dog, weighing 18 kg, runs into a park at a velocity of 0.63 m/s. What is the momentum of the dog?

• 11.34 kg*m/s
  

• • 
    

    .035 kg*m/s

  
  

• 28.5 kg*m/s
  

• 17.37 kg*m/s
  

Nora uses a spring scale to measure the net force acting on a 1.5-kg box. Initially, the scale shows a net force of 0.8 N. What happens to the acceleration of the box if the net force is decreased to 0.2 N?

• The acceleration increases to four times its original value, or about 0.13 m/s².

• The acceleration decreases to a quarter of its original value, or about 0.13 m/s².

• The acceleration decreases to a quarter of its original value, or about 2.13 m/s².

• The acceleration increases to four times its original value, or about 2.13 m/s².

Tags

NGSS.MS-PS2-2

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• Segments 2 and 3 have equal periods of time and the force acting in each segment is the same during each period of time. 

• Segments 2 and 3 have equal periods of time but the force during segment 2 is different than the force during segment 3. 

• Segments 2 and 3 have different periods of time, but the force acting in each segment is the same during each period of time. 

• Segments 2 and 3 have different periods of time and the force during segment 2 is different than the force during segment 3. 

Tags

NGSS.MS-PS3-1

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• velocity and position

• velocity, position, and accleration

• velocity and acceleration

• velocity only

Tags

NGSS.MS-PS3-1