motion

What law is best described by inertia?

• 1st
• 2nd
• 3rd
• law of conservation of mass

Equal and Opposite

• 1st
• 2nd
• 3rd
• speed 

What Unit do we Measure Force in? 

• Newtons
• Joules
• Force
• Kilograms

With unbalanced forces, the object will move in the direction that the _______ force is being applied.

• larger 
• smaller 
• equal 
• less

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

A 20 kg bike accelerates at 10 m/s2.  what was the force

• 25 Newtons
• 20 Newtons
• 200 Newtons
• 10 Newtons

Bill jogs 400 meters to Andy's house, turns around, and runs 400 meters back home.  He does so in 267 seconds.  What is Bill's average speed?

• about 3 m/s
• about 1.5 m/s
• 0
• about 4 m/s

What is the formula to calculate speed?

• S = t/d
• S = d/t
• S = d x t
• S = t x d

Dave runs a 400 m race with a speed of 4 m/s. What time will it take him to finish the race?

• 400 minutes
• 100 minutes
• 100 seconds 
• .25 seconds 

A train travels 25 km in .5 hrs. How fast is the train going?

• 25 miles/hr
• 5 miles/hr
• 125 km/hr
• 50 km/hr