Physical Science

What is the speed of an object at rest?

• 9.81 m/s
• 1 m/s
• 0 m/s
• 10 m/s

Which of the following situations represents a negative displacement?(Assume positive position is measured vertically upward along ay-axis.)

• A cat stands on a tree limb.
•  A cat jumps from the ground onto a tree limb.
• A cat jumps from a lower tree limb to a higher one.
• A cat jumps from a tree limb to the ground.

Which of the following units is the SI unit of velocity?

• meter
• meter•second
• meter per second
• second per meter

In the graph above, a toy car rolls from +3 m to +5 m. Which of the following statements is true?

• xf=  +3 m
• xi = +3 m
• x=+3 m
• vavg =3 m/s

Tags

NGSS.MS-PS2-1

The slope of a line drawn tangent to a point on the curve of a position versus time graph describes what concept? 

•  acceleration
• instantaneous velocity
• displacement
• position

Acceleration is defined as

• a rate of displacement
• the rate of change of displacement.
• the change in velocity
•  the rate of change of velocity.

Tags

NGSS.HS-PS2-1

What is the SI unit of acceleration? 

• m/s
• m2 /s
• m/s2
• m•s2

Tags

NGSS.HS-PS2-1

If you know a car’s acceleration, the information you must have to determine if the car’s velocity is increasing is the

• direction of the car’s initial velocity
• direction of the car’s acceleration.
• initial speed of the car. 
• final velocity of the car.

. If you know the acceleration of a car and its initial velocity, you can predict which of the following?

• the direction of the car’s final velocity
• the magnitude of the car’s final velocity
• the displacement of the car
• all of the above

When a car’s velocity is positive and its acceleration is negative, what is happening to the car’s motion?

•  The car slows down.
• The car speeds up. 
• . The car travels at constant speed.
• The car remains at rest.

Tags

NGSS.HS-PS2-1