Physics Final

Which line on the velocity graph shows an object moving at a constant velocity?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

The diagram to the right shows a ball projected horizontally with an initial velocity of 20 m/s east, off a cliff 100 m high. (Neglect air resistance) During the flight of the ball, what is the direction of its vertical velocity?

• downward

• upward

• westward

• eastward

Tags

NGSS.MS-PS2-4

For general projectile motion with no air resistance, the horizontal component of a projectile’s acceleration _____.

• continuously increases

• remains a non-zero constant

• first decreases then increases

• remains zero

Action-reaction forces from Newton’s Third Law _____.

• sometimes act on the same object

• always act on the same object

• always act on different objects

• may form right angles

Tags

NGSS.MS-PS2-1

When the rocket engines on a spaceship are suddenly turned off, while traveling in empty space where there are no external forces, the spaceship will _____.

• stop immediately

• slowly slow down, and then stop

• go faster and faster

• move with constant speed

Tags

NGSS.MS-PS2-2

What is the only centripetal force when a car goes around a flat highway curve?

• normal

• tension

• gravity

• friction

Two objects attract each other gravitationally.  If the distance between their centers is tripled the gravitational force _____.

• is 3 times greater

• is 9 times greater

• is cut in one-third

• is cut in one-ninth

Tags

NGSS.HS-PS2-4

• It is cut in fourth.

• It is cut in half.

• It remains the same.

• It is quadrupled.

Tags

NGSS.MS-PS2-2

If the net work done on an object is negative, then the object's kinetic energy _____.

• increases

• decreases

• is zero

• remains the same

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

An object moving East begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration.

• The car is decelerating, and its acceleration is positive.

• The car is decelerating and its acceleration is negative.

• The acceleration is zero.

• A statement cannot be made using the information given.