Newton's Laws
BOB KARATE CHOPS A BOARD WITH A FORCE OF 3000N Downward. WHAT FORCE DOES THE BOARD EXERT ON HIS HAND? Include direction
3000N Upward
JIM APPLIES A 10N FORCE TO PUSH A BOX ACROSS THE FLOOR AT CONSTANT VELOCITY. WHAT IS THE MAGNITUDE OF THE FRICTIONAL FORCE ON THE BOX?
10 N
If a force is exerted through a rope, wire, or cable what type of force is it?
Tension
Arachnophobia is a fear of?
SPIDERS
A 10kg block accelerates to the right at 5 m/s2. What is the net force on the block?
50 N
FRICTION ALWAYS GOES IN THIS DIRECTION
Opposite to the direction of motion
Consider the situation. A book initially moving east, slows down as it slides across a rough surface.
DRAW THE FBD OF THE BOOK.
CORRECT ANSWER ON WHITE BOARD
THIS COUNTRY BORDERS 14 NATIONS AND CROSSES 8 TIME ZONES
RUSSIA
A disk slides with a constant velocity. Are the forces balanced or unbalanced?
Balanced
WHAT IS THE DIFFERENCE BETWEEN STATIC AND KINETIC FRICTION?
Static - holds object at rest, kinetic - acts against moving object
WHAT FORCES ARE ACTING ON A BALL IN FREE-FALL?
GRAVITY
THIS IS THE HOTTEST PLANET IN OUR SOLAR SYSTEM
VENUS
If I push a tennis ball and a bowling ball with the same force, how do their acceleration compare?
Tennis ball has a smaller mass and larger acceleration, bowling ball has a larger mass and a smaller acceleration.
How do the magnitude of Static Friction Force and Kinetic Friction Force compare.
Static Force is bigger than the Kinetic Force (ALMOST ALWAYS)
WHAT IS THE NORMAL FORCE?
force of surface on object, perpendicular to surface
MYCOLOGY IS THE STUDY OF THIS EARTHY ORGANISM
FUNGI (MUSHROOMS, ETC)
A BUG HITS THE WINDSHIELD OF A CAR. USE NEWTON'S LAWS TO EXPLAIN WHY THE BUG GETS SQUASHED BUT THE CAR DOES NOT.
Same force, but bug has less mass...so more acceleration
If a 50-N book is pushed across a surface that has a coefficient of kinetic friction 0.5, what is the frictional force it experiences if it moves with a constant velocity?
25 N
Consider the situation. A person pushes horizontally on a book against a vertical wall to keep it from sliding downwards. There is friction between the wall and the book.
DRAW THE FBD OF THE BOOK.
CORRECT ANSWER ON WHITE BOARD
What popular video game has a monster called an Enderman?
Minecraft