Energy
What type of energy is stored?
Potential energy is stored.
What is the equation to find the speed of an object?
P=mv
What is the difference between scalar and vector?
vector has a magnitude and velocity however scalar just has velocity and no magnitude.
What equation do you use to find acceleration?
F net=ma
What does KE stand for?
KE stands for Kinetic energy and
What type of energy does a working circuit uses?
Are you working circuit uses electrical energy because it is connected to electricity for power.
Define momentum
Momentum is amount of energy stored energy which depends on mass and velocit.
What equation do you use to find speed.
t=d/v
Define force?
Amount of strength or energy put into an action or movement.
What does g stand for. What does g always equal to.
G stands for gravity, and g will always equal to -9.81 m/s^2
What type of energy does a lightbulb use?
A lightbulb uses electricity which means it uses electrical energy. Even though the lightbulb gives out heat it still uses electricity to turn it on and light up.
A .149 kg baseball is moving at 15 m/s. It is brought to rest in .040 seconds by a baseball glove. The magnitude of the average force exerted on the ball by the glove is?
56N
Define motion.
Motion is a process of an object moving or being moved.
What diagram will help you do you word problems for forces? Show me what it is.
The box method is a very useful method in the word problems for forces. You put a box and then you show four Arrows one going up one going down one going to the left one going to the right. The one going up is always a Fn, the one going down is always Fg and Fapp is going to the right and lastly Ff goes to the left.
A car has a final velocity of 0 m/s. The initial velocity is 25 m/s the car decelerates at a piece of 3 m/s. How long did it take to reach the final velocity.
-8.3333 secounds
How do windmills produce energy?
When the wind pushes past the wind turbine, its blades uses the wind's kinetic energy and rotates, turning it into mechanical energy. The rotation of the blade turns the shaft which is connected to a gearbox, which increases the speed of rotation. That spins a generator which creates electricity.
Airbag is to safely decrease momentum of a driver and passengers in a car crash. The airbag reduces the magnitude of the force acting on the driver by
Increasing the length of time the forces act on the driver and passengers
when the graph goes to the negatives does the distance go backwards or does it continue to the positives
You can never have negative distance so when you go negative on the graph it keeps adding up positive because distance is about the amount traveled.
22 kg box is pulled across a floor by a force of 100 N. The box has an acceleration of 2 m/s squared, calculate the force of friction acting on the box.
F=ma
=(22kg)(2 m/s^2)
= 44N
44=100N-Ff
Ff= 56N
A runner decreases speed from 8 m/s to 4 m/s in the span of four seconds. What is the magnitude of the runners acceleration?
A= 1m/s^2
How is nuclear energy created?
To create nuclear energy you heat up a metal called uranium by steaming water, which conducts heat and when the heat is conducted the turbines start to turn, which triggers the Generator to store the energy and create a nuclear energy.
.025 kg bullet is shot by a rifle, the bullet started at rest and unbalanced force of 200 N. If the force acts on the bullet for a point second what is the maximum speed by the bullet
J=Ft
800m/s=change in velocity
Convert 10916 to ns
1.0916x10ns
Who is Newton, what is his laws and how many laws are there?
Newton is a scientist who discovered gravity. His laws were 1st law was” In the absence of a net force, an object at rest will stay at rest and an object in motion will stay in motion with a constant velocity“ second law “net force equals mass times acceleration“ his third law was “whenever one object excerpts a force on another object, The object always exerts an equal but opposite force back on the first object” So in total there are the laws of newton.
How many kinematic equations are there. What are they?
There are four kinematic equations, they are displacement(D), velocity (v), time(t), and acceleration (a).