Forces & Circular Motion
What is the unit of centripetal force?
Newton (N)
What is the unit of energy?
Joule (J)
What is the unit of current?
Ampere (A)
What is the unit of frequency?
Hertz (Hz)
The formula used to calculate Momentum
What is p=mv?
What does a net force of zero mean for an object’s motion?
It is at rest or moving at constant velocity
What is the equation for kinetic energy?
Ek = 1/2(mv2)
What is the unit of resistance?
Ohms
What type of wave is a light wave modelled after?
Transverse
The formula used to calculate Impulse.
I=force x time = mass (change in velocity)
What does Newton's 2nd law state?
F = ma
What is meant by conservation of energy?
Energy cannot be created or destoyed
How does current behave in a series circuit?
It is the same throughout
What type of wave is a sound wave
Compressional or longitudinal
How an airbag helps in an accident
Increases the time for impact, thereby reducing the force of the impact
What is the direction of the velocity when an object moves in a circle
Tangental to the circle
What is power?
The rate of energy transfer or work/time or voltage x current
What measurements does electric force depend on (what givens would you use to calculate it, in words)
magnitude of charges, and the distance between them
What is the amplitude of a wave (or how do you measure it?)
The distance between the equilibrium point, and either a crest or trough.
If a 30 kg boy in a 100 kg boat tosses a package towards the shore, what type of collision is this?
A recoil, or explosion
What is the direction of the acceleration when an object is moving in a circle.
centripetal, or in towards the center of the circle.
On a frictionless roller coaster, what will the speed be of a car that has a mass of 1000 kg when it reaches the bottom of a 100m high hill?
44.27 m/s
What happens to the overal resistance in a parallel circuit as you add more resistors in parallel?
The overall resistance decreases
Where you can measure wavelength of a wave.
What is crest to crest, trough to trough, or from one point on a wave to the same point on the next wave.
A 30 kg boy standing on the ice catches a 10 kg medicine ball thrown at him. How fast will he be sliding on the ice after the catch if the medicine ball was traveling 2 m/s before he caught
.5 m/s