Physics Semester Final Review

What is a hypothesis?

• A random guess
• A proven fact
• A proposed explanation for a phenomenon or a scientific question
• A mathematical equation

What is the difference between distance and displacement?

• Displacement = magnitude & direction

  Distance = magnitude ONLY

• Displacement = magnitude ONLY

  Distance =

  magnitude & direction

• Time and space
• Distance is scalar

  Displacement is vector

What is the definition of speed? Is it Scalar/Vector?

• s = d/t

• Magnitude
• Scalar
• s = dt

Tags

NGSS.MS-PS3-1

What is instantaneous speed?

• The acceleration of an object at a specific point in time
• The distance traveled by an object in a specific direction
• The speed of an object at a specific point in time
• The average speed of an object over a period of time

What is average speed?

• Average speed is the maximum speed reached during the journey.
• Average speed is the speed at which an object is moving at a specific moment in time.
• Average speed is the speed at which an object is moving at rest.
• Average speed is the total distance traveled divided by the total time taken.

What is the difference between speed and velocity?

• Speed and velocity are the same thing
• Speed measures distance while velocity measures time
• Speed is a scalar quantity that measures the rate of motion, while velocity is a vector quantity that measures the rate of motion in a specific direction.
• Velocity is a scalar quantity while speed is a vector quantity

What is acceleration? Is it Scalar/Vector

• Speed with direction

• Vector
• a = vf-vi/t

• Scalar

Tags

NGSS.HS-PS2-1

What is free falling?

• Motion of an object suspended in mid-air
• Motion of an object propelled upwards by a force
• Motion of an object falling under the influence of gravity with no other forces acting on it
• Motion of an object floating in the air

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

At the top of its path, if an object is thrown straight up into the air, its speed is?

• zero
• increasing
• constant
• decreasing

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-1

What is the acceleration of freefall (gravity) equal to? (this is a constant number)

• 9.81 m/s^2
• 5.67 m/s^2
• 10.25 m/s^2
• 7.93 m/s^2

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5