Newton's Laws
An object's tendency to resist a change in motion is called what?
Inertia
Define acceleration
A change in speed and/or direction
Two positive ions will..?
Repel
0.5mv^2
Type of waves that can travel through empty space
Electromagnetic waves
According to Newton's second law, acceleration depends on what two factors?
Mass and net force
In an elastic collision, the momentum from the first object does what?
Transfers to the second object
What two things change the strength of a magnetic field?
Size of the magnet and distance from the magnet
Energy stored in the bonds between atoms
Light waves passing through a medium
Tranmission
The passenger of a car continues moving forward as the car brakes.
Newton's 1st law
A car accelerates at a green light at the speed of 10 m/s for five seconds.
What is the acceleration of the car?
2m/s
What type of friction exerts the greatest force?
Sliding friction
What is the most common type of energy?
Thermal energy
Light waves changing direction when they pass through an object
Refraction
What is the mass of an object if the applied force is 400 N and the acceleration is 20 m/s/s.
20 g
A 5kg baseball is thrown across a field. It has a momentum of 60 kg/m/s. What was the speed of the baseball?
What two things can increase the power of an electromagnet?
A larger battery and more coils
What is the potential energy of a 200kg rollercoaster sitting at the top of a 100m slope?
20,000 J
Waves that move perpendicular to a medium
Transverse waves
What is the force applied to an object if the acceleration is 600 m/s/s and the mass is 300 kg.
180,000 Newtons
A skier with a mass of 60kg is moving down a slope with a velocity of 20m/s. What is the skier's momentum?
1,200 kg/m/s
What is the flow of ions through a conductor called?
An electric current
What is dissipation?
When the total energy in a system decreases as it converts outside the system
High density area of longitudinal waves