Newtons Law
A force is a ____ or a ____.
push, pull
A ball falls from the top of a random building for 5 seconds. How far did it fall?
-122.5m
like charges _____; opposite charges _____
repel; attract
When a NASCAR race car speeds around a circular track, what keeps it from flying off the side?
Centripetal force
If I want to apply more torque but keep the force constant what do I need to do to the distance?
increase the distance
when the sun of all forces on an object is equal to zero, we call this ____
equilibrium
Which of the following is a pair of vector quantities?
A) speed - distance
B) velocity - distance
C) velocity - displacement
D) speed - displacement
C
Voltage is the ____ that electrons feels.
the push
What would happen to the force if Mass 1 is tripled and distance is cut in half?
12F
what is the unit for torque?
Newton-meters, NM
state Newton's First Law
an object in motion will remain in motion unless acted on by a force
What is the variable that links x and y direction?
time
the resistance is the ____ of electrons.
restriction of the flow
What is the gravitational attraction between earth (5.98 x 10^24) and the sun (1.99 x 10^30) when they are 1.5 x 10^11 meters apart?
3.53 x 10^22
what is the definition of work? what are the units?
the ability to convert energy from one form to another; Joules (J)
state Newton's second law
an object will accelerate or change direction when a force is applied. F=ma
List 3 vector quantities
velocity acceleration displacement
what drops in a series circuit? What stays the same?
voltage; current
In a sporting event called the "hammer throw" an athlete spins a heavy ball on a cable. What is the athlete pulling against?
the ball's inertia
Name the 5 different types of energy.
electrical, chemical, thermal, nuclear, and electromagnetic
state Newton's third law
for every action, there is an equal and opposite reaction
A ball is thrown at a launching angle of 52 degrees above the ground, with a velocity of 18 m/s. How far will the ball go before being caught?
15.5 meters
what drops in a parallel circuit? what stays the same?
current; voltage
You and a friend are riding a merry-go-round who has a greater tangential speed?
the person farthest from the center
what is a lever arm?
the perpendicular distance from the point of force to the axis of rotation