Describe Newton's Laws and their applications to motion.
Given F=ma, calculate the motion of an object
If a 5 kg object is acted upon by a force of 20 N,
what is its acceleration? If it starts from rest,
what will be its speed after 3 seconds?
What is the difference between mass and weight?
If and object has a mass of 2 kg, what is its weight
under normal Earth gravity?
If a crate weighs 120 pounds, what is its mass?
Describe static and kinetic friction and their applications
If the coefficient of static friction of a surface
is 0.5 and the coefficient of kinetic friction is 0.4,
then how much force will be required to set in
motion a 40 kg crate? How much force will be
required to keep it going at a constant velocity a
after starting?
If a large truck and a Volkswagen collide, which
is acted upon by the larger force?
If more than one force acts on an object, how do you
predict its motion from Newton's second law?
If a 10 kg object falls in the Earth's gravity but is acted
upon by a 40 N air resistance force, what will be its
acceleration?
Does motion in a circle at a constant speed involve
an acceleration?
What is the difference between centrifugal force
and centripetal force? Which can you measure
with a scale?
Calculate the centripetal force on an object moving
in a curved path, given the mass, velocity, and radius
of curvature of the path.
If a Ferris wheel ride has a diameter of 20 meters
and a speed of 8 m/s, what is the centripetal
acceleration of a rider? What is the centripetal
force on a 70 kg rider? Why do you feel lighter
at the top of the ride and heavier at the bottom?
How does the force of gravity change with distance?
If an object weighs 600 N at the Earth's surface, what
will it weigh twice as far out from the Earth's center?
...three times as far out?
What causes the tides? Why are there two per day
instead of just one?
What is torque? How can you increase the torque
on a wrench to turn a stubborn bolt?
What is required for equilibrium of a large object?
Why do you pick up a long board at it's center? Why
is it difficult to lift it by one end alone?
Why does a skater spin faster if they pull their legs
and arms in?
What is the difference between centrifugal force
and centripetal force? Which can you measure
with a scale?
