speed/velocity/acceleration
If Calvin hits a tennis ball and it goes from 0 mph to 70 mph in 5 seconds, what is being described about the ball? speed, acceleration or velocity?
acceleration
What is energy in motion?
Kinetic energy
Which 2 items do you need to consider in a system?
matter and energy
What is the formula for momentum?
Momentum = mass x velocity
As distance increases, gravitational force does what?
increases or decreases?
decreases
For Alejandro to win the skateboard race, he must skate 30 meters within 60 seconds in a straight line. What does his average velocity need to be to win the race?
.5 m/s
What is energy that is stored?
potential energy
In which system does energy and matter move freely (in and out)?
open
Speed and direction =
acceleration, speed or velocity?
velocity
If you’re riding a wave and your surfboard hits a sandbar and stops and you keeping moving, which law of Newton’s is this showing?
Newton's First Law
If you increase your time, does your speed increase or decrease?
Decrease
Which is not potential energy?
A. A tennis ball sitting on a shelf
B. Space Mountain roller-coaster racing down the hill
C. An stretched elastic band
In a closed system what can’t move freely?
matter
If we decrease force, does the amount of work being done increase or decrease?
decrease
When potential energy is converted to kinetic energy this is the law of ?
Conservation of Energy
What is happening with your speed as your time increases?
speed slows
When you talk about atoms splitting and a explosion happening you have
____________ energy to ____________ energy
nuclear to mechanical
What type of system does a thermos represent?
To solve for a missing velocity what 2 things do you need to set each other equal?
Initial Momentum = Final Momentum
Energy can neither be _________ or ____________
created or destroyed
You go 3.05 m in 3.2 seconds
Find the speed
Speed 95.32
Chemical energy is energy stored in the __________ of molecules and is ____________ energy
bonds/potential
In which systems can matter not move freely?
closed and isolated
Initial Momentum
Object A Mass = 2 kg Velocity = 3 m/s
Object B Mass = 1 kg Velocity = - 2m/s
Final Momentum
Object A Mass = 2 kg Velocity = 3 m/s
Object B Mass = 1 kg Velocity = ?
What is the final velocity of Object B?
v = -2 m/s
The smaller the mass of an object, the _________ the acceleration of that object when a force is applied. The greater the force applied, the greater the __________
greater/acceleration