Circular Motion
Energy
Forces
Momentum
Rotation Kinematics
100
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
What is Newton's second law?
100
The friction between the road and the tires
According to the work-energy theorem, if work is done on an object, its potential and/or kinetic energy changes. Consider a car that accelerates from rest on a flat road. What force did the work that increased the car’s kinetic energy?
100
push or pull
What is a force?
100
The same as on Earth
A lunar vehicle is tested on Earth at a speed of 10 km/h. When it travels this fast on the moon, how does its momentum compare to the momentum on Earth?
100
π/15
The angular velocity of a rotating wheel increases 2 revolutions per second every minute. The angular acceleration, in rad/s2 of this wheel is:
200
A centripetal force
What is the force that causes an object to follow a circular path?
200
Potential energy.
A stretched spring must have what kind of energy?
200
9.8 m/s^2
What is the numerical form for the force of gravity?
200
The momentum of the falling apple is transferred to the Earth
When an apple falls from a tree and strikes the ground without bouncing, what happens to its momentum?
200
π/1800
The angular velocity in rad/s of the minute hand of a watch is:
300
Yes
A car rounds a curve while maintaining a constant speed. Is there a net force on the car as it rounds the curve? Yes or No?
300
The energy that an object possesses due to its motion.
What is kinetic energy?
300
Left
If there is a net force with more force pushing from the right, where does the object move?
300
3
When the velocity of an object is tripled, by what factor is its momentum changed?
300
2π
What is one revolution in radians?
400
No; there is an inward net force.
A passenger on a Ferris wheel moves in a vertical circle at constant speed. Are the forces on her balanced? Yes or No?
400
Stored energy of position
What is potential energy?
400
100 N
You are lifting a 10 kg block straight up at a constant speed of 12 m/s. How much force are you exerting on the block? Gravity is 10.
400
4
When the velocity of an object is doubled, by what factor is its kinetic energy changed?
400
half the angular velocity of wheel 1
Two wheels roll side-by-side without slipping, at the same speed. The radius of wheel 2 is twice the radius of wheel 1. The angular velocity of wheel 2 is:
500
Points toward the center of the circle.
If an object is moving in a circle at constant speed, what does Newton’s Second Law inform us about the motion?
500
W = 0
An elevator of mass m is initially at rest on the first floor of a building. It moves upward, and passes the second and third floors with a constant velocity, and finally stops at the fourth floor. The distance between adjacent floors is h. What is the net work done on the elevator during the entire trip, from the first floor to the fourth floor?
500
Time equals the square root of 2 times displacement over acceleration.
What is the free fall equation?
500
Momentum doubles; kinetic energy will increase by four times.
If a moving object doubles its speed, how much more momentum does it have? How much more kinetic energy?
500
An outward force apparent in a rotating reference frame; it does not exist when measurements are made in an inertial frame of reference.
What is centrifugal force?
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