1. SEISMIC SLEUTHS Part 1 Newton’s Laws
EARTHQUAKES AND PHYSICS?
Newton’s laws
Liquefaction lab
Smart Sitting
Energy and Quakes
CAN BUILDINGS BE MADE SAFER?
Building Fun
Structural Reinforcement
BOSS
Earthquake in a Box
Building Challenge
Find and Fix the Hazards
Strengthening your House

2. Newton’s Laws of Motion:
_____________________
Objects keep on doing what they are doing.

3. ______ is directly related to _____.
The greater the mass the greater the tendency to ___________change of an object’s motion.
objects will continue to do as they are doing __________ __________.

4. _________________: if the net force on an object is _______ (at rest or moving at a constant velocity)

5. ________ friction
_______ friction results when the surfaces of two objects are at rest relative to one another

6. 2nd law: ______ _______: something that disturbs an object’s equilibrium (net force changes an object’s velocity or acceleration)
Need to be able to find the net force (sum of all forces on an object) since net force causes an object’s acceleration

7. 2nd Law: acceleration of an object is proportional to the mass of the object being accelerated
__________
a is in m/s/s
m is in kg,
F is kgxm/s/s or ________
__________ (weight)
Gravity (9.8 m/s/s)

8. Unbalanced force
The _________ force is cancelled by the force of _________.
The book is sliding to the right but there is _____force in that direction.
Because _________ friction is currently the only horizontal force it will cause the book to come to a stop

9. ___________ Friction
If a car slams on its brakes and skids to a stop (without antilock brakes), there is a sliding friction force exerted upon the car tires by the roadway surface.

10. Causes of friction:
When the high points of each surface touch they bond, you must break these bonds to move one of the pieces (origin of static friction)
As surfaces move across each other, _________ forces continue to attract between high points, resulting in the weaker kinetic friction
Air drag (any fluid) depends on speed of the motion (getting larger as speed increases)
size and shape of object
_________ of fluid

11. Forces
________________ The contact force that acts to oppose sliding motion between surfaces. ____________ to the surface _____________ the direction of sliding
______________ The contact force exerted by a surface on an object. _______________ to and away from the acceleration of the object barring any resistive forces.

12. 3rd law:
__________________________________________________________________________