MFE Chp 2 Lesson 3 Newton's Second Law

Accelerations are produced by

• forces.
•  velocities.
•  accelerations.
•  masses.

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NGSS.MS-PS2-2

What happens when unbalanced forces act on an object at rest?

• the object remains at rest
• the object begins moving in an unpredictable direction
• the object begins moving in the direction of the net force
• the object begins moving opposite to the direction of net force

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NGSS.MS-PS2-2

What is the net force?

• 40 N left
• 0 N Balalnced
• 400 N right
• 40 N right

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NGSS.MS-PS2-2

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

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

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NGSS.MS-PS2-2

What Unit do we Measure Force in? 

• Newtons
• Joules
• Force
• Don't know

F=MA

Spiderman slows the train car with a mass of 38600 kg at an acceleration rate of 1.25 m/s². How much force does he have to apply to stop the train? (Strongest person on Earth actually can generate 4000 Newtons in a bench press... which is equal to 885 lbs)

• 48250 N

• 30880 N

• 4000 N

• 885 N

45 m/s² is the... 

• Mass
• Force 
• Acceleration
• weight

Tags

NGSS.MS-PS2-2

20 N is the

• mass

• speed

• force

• acceleration

When force is 20 N, mass is 5 kg, what is acceleration?

F = ma

• 25 m/s/s

• 5 m/s/s

• 100 m/s/s

• 4 m/s/s

The force that pulls an object in a circular motion and keeps it in a circular motion is centripetal force.

• True
• False