velocity/acceleration

A runner races in the 100 meter dash.  It takes her 10 seconds to finish.  What is her average speed?

• 10 m/s
• 1000 m/s
• 100 seconds
• 10 seconds

Which of the following represents a velocity?

• 40 m
• 40 m north
• 40 m/s
• 40 m/s north

Velocity is both ____ and _____. 

• speed , direction 
• direction, mass
• volume, density 
• direction, magnitude 

A car moves a distance of 1000 m with an average speed of 28 m/s.   Calculate the time.

• 36 seconds
• 28,000 seconds
• 28 seconds
• 972 seconds

Joe walked 12 meters from his seat to his teacher’s desk to turn in an assignment. On the way back to his seat Joe stops and talks to Sarah. Sarah’s desk is in the front row, exactly 5 meters from the teacher’s desk. What is Joe’s displacement in meters?

Answer explanation

Need a unit

How long will it take to travel 78 miles if you are traveling at 65 miles per hour?

• 5070 h

• .83 h

• 1 h

• 1.2 h

An object has a negative velocity and a negative acceleration. The object is:

• Speeding up

• Slowing down

• Moving at a constant velocity

• At rest

Tags

NGSS.HS-PS2-1

As an object is thrown up, If up is considered positive and down is considered negative, what is the direction of the velocity and acceleration of the object at its highest point

• Velocity: 0 Acceleration: 0

• Velocity: 0 Acceleration: -

• Velocity: 0 Acceleration: +

• Velocity: - Acceleration: 0

Tags

NGSS.HS-PS2-1

A dog running with an initial speed of 7.5 m/s comes to a stop in 15 seconds. What is the dog's acceleration?

• -7.5 m/s

• -7.5 m/s²

• -0.5 m/s²

• 7.5 mi//hr

Tags

NGSS.HS-PS2-1

A teacher does the following motion in 10 seconds: (i) walks 4 m, south (ii) walks 8 m, east (iii) walks 4 m, north (iv) walks 8 m, west. The average velocity of the teacher is ____.

• 0.0 m/s
• 0.6 m/s
• 1.2 m/s
• 2.4 m/s