Extra Science Finals Reviewer

Which statement describes best the motion diagram of an object in motion?

• A graph of the time data on a horizontal axis and the position on a vertical axis.

• A series of images showing the positions of a moving object at equal time intervals.

• Diagram in which the object in motion is replaced by a series of single point.

• A diagram that tells us the location of zero point of the object in motion and the direction in which the object is moving.

What is displacement?

• The vector drawn from the initial position to the final position of the motion in a coordinate system.

• The length of the distance between the initial position and the final position of the motion in a coordinate system.

• The amount by which the object is displaced from the initial

• position.

  The amount by which the object moved from the initial position.

What is the purpose of drawing a motion diagram or a particle model?

• To calculate the speed of the object in motion

• To calculate the distance covered by the object in a particular time

• To check if an object is in motion

• To calculate the instantaneous velocity of the object in motion

  Estimate the time taken by the athlete to reach 65 meters.

  

•   6.0 s

•     6.5 s

     

• 5.5 s

• 7.0 s

What was the instantaneous position of the athlete at 2.5 s?

• 15 m

• 20 m

• 25 m

• 30 m

  Which statement defines the velocity of the object’s motion?

 

• The ratio of the distance covered by an object to the respective time interval.

•     The rate at which distance is covered.

•     The distance moved by a moving body in unit time.

     

• The ratio of the displacement of an object to the respective time interval.

What is a simplified version of motion diagram in which the object in motion is replaced by a series of single points?

• Particle Model

• Motion Model

• Dot Diagram

• Point Diagram

Which of the statements given below is correct?

• Average velocity cannot have a negative value.

• Average velocity is a scalar quantity.

• Average velocity is a vector quantity.

• Average velocity is the absolute value of the slope of a position-time graph. 

Which of the following describes a straight-path motion?

   

• A baseball soaring over a fence for a home run.

    

•   A spinning ride at an amusement ride.

     

• A child swinging back and forth.

•     None of the above

Which of the following is not a vector quantity?

  

•   Force

•     Displacement

   

•    Velocity

•     Time