Physics Unit 1 Pretest

As a car is driven south in a straight line with decreasing speed, the acceleration of the car must be

• directed northward

• directed southward

• zero

• constant, but not zero

Tags

NGSS.MS-PS2-2

One car travels 40 meters due east in 5.0 seconds, and a second car travels 64 meters due west in 8.0 seconds. During their periods of travel, the cars definitely had the same

• change in momentum

• total displacement

• average velocity

• average speed

An object is dropped from rest and falls freely 20 meters to Earth. When is the speed of the object 9.8 m/s?

• at the end of its first second of fall

• during its entire time of fall

• during the entire first second of its fall

• after it has fallen 9.8 meters

Tags

NGSS.MS-PS3-1

As an object falls freely, its

• Velocity increases

• Acceleration increases

• Both A and B

• None of the above

Tags

NGSS.MS-PS2-4

Suppose an object is in free fall. Each second the object falls

• The same distance as in the second before

• A larger distance than in the second before

• With the same instantaneous speed

• With the same average speed

• None of the above

A scalar is a quantity that has

• Direction

• Magnitude

• Time

• Color

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always

• In the direction of motion

• Opposite its velocity

• Directed downward

• Directed upwards

Tags

NGSS.MS-PS2-4

A stone is dropped on Mars which has an acceleration of gravity of 3.8 m/s². This means the stone:

• increases 3.8 meters for each second it falls

• increases its speed by 3.8 m/s each second it falls

• the speed is a constant 3.8 m/s

• increases its acceleration by 3.8 m/s² each second it falls

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

A ball is thrown straight up. When the ball reaches its highest point:

• Velocity: 0, Acceleration: 0

• Velocity: 0, Acceleration: -9.8 m/s²

• Velocity: 2 V₀, Acceleration: -9.8 m/s²

• Velocity: ½ V₀, Acceleration: 0

• Velocity: 0, Acceleration: -4.9 m/s²

Tags

NGSS.MS-PS2-4

Person A is on a cliff and throws a ball straight up at 10 m/s. Person B is on the same cliff and throws a ball straight down at 10 m/s. Which person’s ball will hit the ground at a faster speed? (Neglect Air Resistance)

• Person A

• Person B

• They will both have the same speed

• Depends how high the cliff is

Tags

NGSS.HS-PS2-1