Flashcards in Exam 3/16/17 Deck (41)
How many radians are in a circle?
The symbol for the SI unit of angular speed is...
rad/second, or s-1.
What 2 factors does gravitational force depend?
Radius and mass
The symbol G in the formula for Newton's law of gravitation is...
6.674 x 10⁻¹¹ and it is a universal constant.
What is the unit of work?
The force exerted by a spring is called a(n) (Hint: Persons name)
Hooke's law force
The SI unit of power is the...
How much will the kinetic energy of a school bus increase if its velocity is doubled?
Provide 2 examples of conservative forces.
2) Central forces
3) Hookes Law forces
4) Electric force.
Provide 2 examples of non-conservative forces.
2) Air resistance
The formula Ug = |mg| h is used to determine
gravitational potential energy.
mechanical energy that objects possess because of position or condition
the SI unit of energy and work
the rest position of a system (the state of 2 forces balancing out)
a value used in Hooke's Law with the units N/m. (represented by k).
the energy transferred to or from a system as a force acts on it through a displacement
SI unit of power
a scientific law that states that within the elastic limit of a material, the restoring force is directly proportional to the displacement of the system from its equilibrium position
the property of a system that gives it the ability to do work
a force that can convert kinetic energy to potential energy and vice versa without loss
the sum of the potential energy and kinetic energy of a system
total mechanical energy
the time-rate at which work is performed.
a lever in which the load is between the fulcrum and the effort force
the ratio of the output force of a machine to its input when friction is not present
ideal mechanical advantage
a lever in which the fulcrum is between the resistance load and the effort force
the ratio of useful work output to work input for a machine
the ratio of a machine's output force to its input force
actual mechanical advantage
a raised surface. (A ramp)
a lever in which the effort force is applied between the fulcrum and the load