Rotation & Revolution
When an object revolves around and internal axis.
What is rotation?
This is the time to take to make one revolution, but this is how often an object completes a revolution.
What is the difference between period and frequency?
Point through which the whole weight of the object seems to act.
What is the center of gravity (mass)?
What is rotation?
The resistance of an object to changes in its rotational motion is
What is rotational inertia?
When an object moves around and external axis.
What is a revolution?
When an object experiences uniform circular motion, the direction of the net force is
What is towards the center of the circular path?
If an objects center of gravity is beyond the support base the object is in unstable equilibrium and will
What is topple?
If you place a pipe over the end of a wrench when trying to rotate a stubborn bolt, effectively making the wrench handle twice as long, you'll multiply the torque by...
What is two.
Rotational Inertia depends on the _______ the mass is from the ________.
What is distance and axis of rotation?
The closer and object is to the center of a rotating object the _____________ the linear velocity will be.
What is smaller?
Consider a particle moving with constant speed such that its acceleration of constant magnitude is always perpendicular to it velocity. Describe this particles motion.
What is moving in a circle?
Method that is used to find the center of gravity for irregularly shaped objects.
What is the plumb bob method?
A ball gains speed while rolling down a hill due mainly to..
What is an unbalanced torque?
Why is the rotational inertia greater for a gymnast when she swings by her hands from a horizontal bar with her body fully extended than when she executes a somersault with her body fully extended?
What is because when she somersaults she has a smaller rotational inertia since her mass is concentrated closer to the axis of rotation.
Convert 0.25 rev/s to rad/s.
What is 1.57 rad/s?
What is one-fourth as big.
To kick a football so it won't topple end over end, kick it so the force of impact extends...
What is through its center of gravity.
Two people are balanced on a seesaw. If one person leans inward toward the center of the seesaw, that person's end of the seesaw tends to...
What is rise?
What is the law of conservation of angular momentum?
Convert 7200 RPM to rad/s.
What is 754 rad/s?
As you go over a hill in your car, your apparent weight will...
What is be less than your normal weight.
The famous Leaning Tower of Pisa doesn't topple over because the center of gravity is
What is above a place of support.
A solitary boy cannot balance on a seesaw with its fulcrum at its midpoint. if the fulcrum is moved to one-quarter the distance from the boy, balance is achieved when the weight of the boy is...
What is more than the weight of the seesaw.
What is extend their arms outward?