A vector is a quantity that had

• magnitude and time
• time and direction
• magnitude and direction
• direction and rhythm 

A scalar is a quantity that had

• direction
• magnitude
• time
• color

The horizontal component of a projectile's velocity is independent of...

• it's range
• time
• the vertical component
• none of these

At the instant a ball is thrown horizontally with a large force, an identical ball is dropped from the same height. Which ball hits the ground first? 

• Neither- they hit at the same time
• the horizontally thrown ball
• the dropped ball
• None of these

Tags

NGSS.MS-PS2-2

T/F The vector sum is the resultant. 

• True
• False

Which speed/ time graph applies to an object at rest?

• A

• B

• C

• D

Which represents the acceleration of the ball?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

Which of the following depict the speed of the blowing ball?

• A
• B
• C
• D

Tags

NGSS.MS-PS3-1

Is it possible for an object moving with a constant speed to accelerate?  Explain. 
A) No, if the speed is constant then the acceleration is equal to zero.  B) No, an object can accelerate only if there is a net force acting on it.  
C) Yes, although the speed is constant, the direction of the velocity can be changing.  
D) Yes, if an object is moving it can experience acceleration 

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1

An object moves with a constant speed of 30 m/s on a circular track of radius 150 m.  What is the magnitude of the acceleration of the object?    
A) zero  
B) 0.17 m/s2  
C) 5.0 m/s2 
D) 6.0 m/s2 

• A
• B
• C
• D

Tags

NGSS.HS-PS2-1