Machines
A machine with a stiff bar that rotates around a fixed point, or fulcrum is called a ________
LEVER!!
A force that goes AGAINST the motion of objects
FRICTION!!
True or False:
Work is only done when a force causes an object to move
TRUE! If an object does NOT MOVE when force is applied, then NO WORK is being done on the object.
When is the last day of school?
June 27th
A machine with a flat surface with one end higher than the other is called an _______
INCLINED PLANE!!!
A force that pulls all objects towards the Earth’s center.
GRAVITY!!!
It is easier to move a box across a smooth surface because there is less . . .
Friction
Which country is Precious's family from?
GHANA!!
A machine that consists of a rope or cable that runs through a grooved wheel is called a ______
PULLEY!!!
True or False:
The stronger the force applied to an object is, the faster and farther it will move.
TRUE!
Why is it easier for a person to move a box using the ramp?
They will be using less force
Which 4th grade teacher's family is Italian?
Mr. Wolfram!!
True or False:
Machines change the amount of work required to move an object.
FALSE! The amount of WORK NEVER changes.
Which force causes a marble to sink to the bottom of a glass of water?
GRAVITY
Brielle pushes a heavy box across the smooth wooden floor of her apartment. If she pushes it outside on the rough concrete, the box will most likely move . .
SLOWER
Guess the 4th grade scholar:
Z _ _ _
*hint: She is in Kenyon*
Zoey
A simple machine that helps move a flag up a flagpole is______
Pulley
What force most likely caused the rock materials to move from the TOP of a mountain to the BOTTOM of a mountain? Explain.
Gravity caused the rock materials to move from the top of a mountain to the bottom because it is a force that pulls objects towards the Earth’s center, making them fall or move downwards.
True or False:
Motion can be described and measured by distance, direction, and speed.
TRUE!!!
Which 4th grade teacher's family is from New Orleans?
Mr. LEON