Move It or Lose It
_____ is the ability to make something move.
Mechanical energy
Henry usually runs about 7.5 mi/hr.
Speed
Force is measured in joules.
FALSE
Force is measured in NEWTONS
Which unit is used to measure work?
Joules
Axe blade
wedge
A rocket is launched, expelling gases downward to the ground, causing the rocket to move upward.
Newtons 3rd Law (Action/ Reaction)
A fixed unmoving object or location is _____.
A reference point
On the day of the race, Henry ran along the track toward the east at 7.5 mi/hr.
velocity
The spot where a lever turns is called a fulcrum.
True
What is the decrease in effort that is needed to move an object called?
Mechanical Advantage
Broom
Lever
You are sledding and the sled stops when it hits a branch hidden in the snow. You keep moving and slide off the sled.
Newtons 1 Law
An action in motion, stays in motion
_____ is the change of an object’s position.
Motion
The runner at the front of the race suddenly stumbled over a piece of gravel. His speed slowed.
Acceleration
The resistance force works against the effort.
True
Which machine is a bar that turns on a point?
(turns on a fulcum)
Slide
Incline plane
It took one student to pick up a box filled with feathers and two students to pick up the same-sized box filled with books.
Newtons 2nd Law
The _____ of an object is determined by its mass and velocity.
Momentum
Henry increased his speed, passed the runner, and won the race.
Acceleration
A simple machine combines two or more machines to make work easier.
False
Which machine is an inclined plane wound around a cylinder or cone?
Screw
Doorknob
Wheel and Axel
In what way does friction affect motion?
Friction is the force between two objects.
Motion is the movement of an object.
Friction impacts motion by if an object is in motion, it would stay in motion forever unless there is an outside force. Friction is an outside force.
Friction helps us to walk.
The resistance to a change in motion is called _____.
Inertia
What is the formula for speed?
s= d/t
Galileo is credited with formulating the three laws of motion we use today.
False
Which machine consists of two inclined planes placed back to back?
wedge
Jar lid
Screw
What effect does gravity have against inertia?
Gravity is the pull between any two objects with mass.
Inertia is the resistance to a change in motion. Without gravity, objects in motion would stay in motion.