What is a magnet?
an object that creates a magnetic field
An object was moving north at 10 meters per second. The object speeds up and now is moving north at 17 meters per second. Is it accelerating or deaccelerating
Accelerating
can a source of electricity run out of electrons?
No
What is the unit of measure for force
Newtons
Which uses the most energy in American homes each year?
Lighting
how is magnetism created?
by the motion of electrons within its atoms
What is velocity?
how is eletricity made?
the movement of electrons through atoms
In a tug of war, when one team is pulling with a force of 100 N and the other 80 N, what is the net force
20 Newtons
The U.S. consumes lots of energy. Which fuel provides the most energy?
Natural gas
How many poles does a magnet have?
two, north and south
What is the equation for acceleration
What is a practical use of electricity
circuits, lightbulbs
Newton's First Law of Motion is also called
Law of Inertia
what is enegry?
the capacity of doing work
is a magnet a force or an enegry source?
Force
A girl travels 20 miles on her bicycle. The trip takes 2 hours. Express her speed in miles/hr.
S =10 mi/hour
how is electricity generated?
wind, water and solar
In the equation F = ma, what does m represent
Mass
he energy of motion, observable as the movement of an object or subatomic particle.
What is the strongest magnet?
neodymium
A car starts from a stoplight and is traveling with a velocity of 10 m/sec east in 20 seconds. What is the acceleration of the car?
0.5 m/sec2
what stops the flow of electricity?
Insulator
How much net force is required to accelerate a 2000 kg car at 3.00 m/s2
6000 Newtons
whats the strongest time of enegry?
nuclear energy