Physics Final Review

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

What is the unit of force in the International System of Units (SI)?

• Joule

• Newton

• Pascal

• Watt

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

A car moves with a constant speed in a counter clockwise direction around a circular path of radius r, as represented in the diagram to the right. When the car is in the position shown, its acceleration is directed toward the _____.

• north

• west

• south

• east

An object moves in a horizontal circular path at a constant speed. Compare the direction of the object’s centripetal force and centripetal acceleration vectors.

• The vectors point in opposite directions.

• The vectors point in the same direction.

• The vectors are perpendicular.

• The question is meaningless, since the acceleration is zero.

Tags

NGSS.HS-PS2-1

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.MS-ESS1-2

• It is cut in fourth.

• It is cut in half.

• It remains the same.

• It is quadrupled.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4