95 Matching questions
- Which will have a bigger coefficient of friction, rubber on a dry concreate or rubber on wet concreate?
- What is the unit of energy?
- What is the difference between apparent weigh and actual weight? What does a scale tell you?
- What is kinetic energy?
- Kinetic Energy
- What is your weight in the middle of the earth?
- As an elevator moves with a constant velocity down towards the bottom floor, what happens to your actual weight?
What about your apparent weigh?
- Why is acceleration due to gravity always negative?
- What is the difference between static and kinetic friction?
- Which type of collision does not have conservation of mechanical energy? What happens to that energy then?
- If a rock in a sling-shot has 700 J of potential energy, what type of potential energy is it? How much kinetic energy will the sling-shot have after it is fired without air resistance? With air resistance?
- What do you bend your knees when you land?
- If a bullet is fired horizontally and another is dropped from the same height, which bullet will hit the ground first?
- What is a free body diagram and what is it used for?
- Name 3 action-reaction pairs?
- Is a fact objective of subjective? Is it usually quantitative or qualitative?
- The force influenced by gravity is called what?
- Inelastic Collision
- If a ball has momentum, it must also have what type of energy?
- What do forces produce?
- What type of collision takes place with the Newton's Cradle? What type of collision takes place with car crashes?
- Elastic Collision
- How are impulse and momentum related?
- What is friction?
- What is the normal force of an object in free fall.
- When the mass is increased, what happens to inertia?
- Why does your body want to keep going forward after an accident when the can has already stopped?
- What is the coefficient of friction? What are it's units? Is the coefficient of static and kinetic friction always bigger between two objects? Why?
- Compare elastic and inelastic collisions.
- Gibe 3 examples of projectiles?
- Why would you not require a seat belt to remain in your seat during a loop-de-loop on a roller coaster?
- As an elevator accelerates up to the top floor?, what happens to your actual weight? What about your apparent weigh?
- In the vertical direction, is a projectile moving at a constant velocity or acceleration? Why?
- What does weight really measure?
- Elastic Potential Energy
- Static Friction
- List Newton's three laws of motion in YOUR OWN WORDS and gives examples of each.
- Mechanical Energy
- If a car is traveling 30 mph needs 100 meters to stop, how much room does it need if it going at 60 mph? How about a 90 mph?
- Explain conservation of momentum in your own words.
- Is momentum a scalar or a vector quantity?
- Gravitational Potential Energy
- Give an example of something with no net force acting on it but still moving?
- What are 2 ways an object can have positive constant acceleration? What are 2 ways an object can have negative constant acceleration?
- If you fell through the center of earth what happens to your speed as you approach the Earth's center? What about as you move away?
- Will you weigh more or less in an elevator accelerating up?
- If a truck and a car collide together, which has a bigger force? What has the bigger acceleration?
- What is the difference between elastic and gravitational potential energy?
- Compare the momentum of a large truck moving 30 mph to the momentum of the same truck moving at 90 mph.
- Know how to convert to SI units (metric conversions).
- Will you weigh more or less in an elevator moving at a constant speed up?
- Kinetic Friction
- What are the SI units for displacement, mass, time, velocity, acceleration, force, energy, momentum, and impulse?
- What is the name of the force that results from a surface pushing back on an object?
- Net Force
- Projectile Motion
- Give an example of when something is accurate, but not precise?
- Can you have constant velocity and constant acceleration at the same time? Why or why not?
- In the horizontal direction, is a projectile moving at a constant velocity or acceleration? Why?
- Describe the energy transformations as a pendulum swings back and forth.
- What is the difference between mass and weight? Which one changes with location? Which one remains the same no matter what?
- What are the 5 steps to the scientific method?
- What is a force?
- How can an object moving and still have inertia?
- When would the momentum of a system not be conserved?
- What forces are shown on a free body diagram?
- How does bouncing increase the impulse?
- If you are in space (frictionless) and you throw an object that is less massive than you, which will move away faster, you or the object? What if the object is more massive than you? What if the object is the same mass as you?
- What is the difference between distance and displacement? Which is a scalar and which is a vector?
- When you increase the mass of an object but apply the same amount of force, what happens to the acceleration?
- What are 3 ways and object can change it's velocity.
- When an object moves in a circle, in which direction does the force point? What is the name of that force?
- What type of force is air resistance?
- Does a stretched out slinky on a table have gravitational or elastic potential energy?
- What is inertia? Is inertia a force?
- A 5 kg cart moves with a velocity of 4 m/s to the left. What is the momentum of the cart?
- a product of force and time interval during which the force acts.
- Impulse does NOT change in a collision; impulse is the change in momentum
- b 60- 400
- c - out, centripetal force
- d Fact- Objective
- e - 0
- f a mesurable extent of some kind
- g -a car pushing on the earth, the earthing pushing back on it
- two people pushing off each other on ice
- a gun shooting out a bullet
- h - inelastic
- it is lost to heat, energy
- i Distance- the total distance traveled
Displacement- the shortest distance from point a to pint b?
- j When objects collide without being permanently deformed or without generating heat
- Energy is NOT lost; there is no damage to either object
- k how replicable a measurement is; AKA How close to the same number each measurement is
- l 1. Question/ Recognize the Problem
3. Predict consequences of hypothesis
4. Conduct experiment and collect data
- m - same force
- car bigger acceleration
- n - mass is amount of matter, reamins the stame
- weigh relative to gravity, pushing down, changes with location
- o - p=-20
- p - constant acceleration
- q - vector
- r G*MKHDDCM*ū*N
- s distance and direction of an object's change in position from the starting point
- t Nearness of a measurement to the accepted true value
- u - static, non moving, the object it still
- kinetic, moving
- v - normal
- w the total energy
- x - to increase time, and decrease force
- y 1. inertia, an object that moves will keep moving, and object at rest will not move, unless another force acts on it
- a ball rolling across a frozen pond, it dose not slow down
2. F=ma, acceleration and mass are directly proportional to force
3. for every action there is an equal opposite reaction
- z - the object
- both the same
- aa energy in motion
- ab an increase in speed
- ac - the smae
- ad - Ug to K
- ae - 90 mph, 3 times grater
- af - both
- ag - it increases, directly proportional
- ah - a drawing with all forces, to show all fouces acting on it
- ai No, because acceleration is change in velocity
- only when your velocity or acceleration ir both is zero
- aj - a man being shot out a a cannon
- a gun shooting out into the are
- throwing a ball in the air
- ak when you hit the target in different places
- al the curved path that an object follows when thrown, launched, or otherwise projected near the surface of Earth
- am the combination of all forces acting on an object
- an - weight
- ao - centripital force forces you out towered the tract into your seat
- ap - same time, because same vertical speed
- aq - less acceleration, less speed
- acceleration decreases, less speed
- ar how heavy something is
- as the force that opposes the movement of two surfaces that are in contact and are sliding over each other
- at - mu
- no units
- au Deals with both magnitude and direction
- av - J Joules
- aw friction that acts on objects that are not moving
- resists motion
- ax - it is pushing down
- ay - constant velocity
- az the product of mass and velocity
- inertia in motion
- ba - a push or a pull
- bb - a force that acts to resist motion of object, or material of contact
- bc - it gets bigger apparent, same actual
- bd The distance an object travels per unit of time
- be - it is a law, the tendency of an object to stay in it's constant state, unless another force acts on it
- bf energy of motion
- bg - more
- bh Potential energy that depends on the height of an object
- bi a vector that is the sum of two or more other vectors
- the final point in the process
- bj - it does not
- bk - momentum stays the same though a system, same in the beginning and end, unless outside forces
- bl an explanation of why things happen that is tested, but is constantly undergoing change; a synthesis of a large body of information that encompasses well-tested and verified hypotheses; not set and can undergo change
- bm - speed up
- bn - actual stays the same
- apparent weigh gets smaller
- bo 1. speeding up
2. slowing down in the negative direction
1. slowing down
2. speeding up in positive acceloration
- bp - because of inertia
- bq - friction
- br - elastic
- less than 700 J
- bs displacement: meter: m
Mass: Kilogram: Kg
Time: Seconds: s
velocity: meters per sec: m/s
acceleration: meters per sec squared: m/s2
Force: Newtons: N
Energy: Joule: J
Momentum: kg * m/s
- bt the tendency of an object to resist any change in its motion
- a law
- bu speed in a given direction
- bv - all fouces, tention, norma, applied, friction, cintripial, weight
- bw elastic- no damage or hear, bounce
inelastic - stick together, or warping, energy losy
- bx - dry
- by - impulse is change in momentum
- bz elastic- the potential to be snap back
gravitational potential energy- has potential to fall
- ca an educated guess; specific, quantitative/ qualitative, includes time period
- cb - amount of gravity
- cc - the acceleration goes down
- cd - when energy is lost, due to outside forces acting on it, work is done
- ce - acceleration
- cf - 0 N
- cg - a ball rolling acros a frozen pond
- ch .- when moving it will stay moving
- ci When colliding objects become entangled or coupled together, thereby generating heat or disfigurement
- Energy is lost during the collision (usually due to heat or friction); there is a change in shape
- cj energy stored by something that can stretch or compress
- ck - elastic
- cl - kinetic
- cm Describing with a single nimber
gives magnitude only
can be both positive and negative
- cn A push or pull exerted on an object
- co - apparent is based on normal weigh at the moment in time and place, scale tells you
- actual weigh is just what you weigh no matter what
- cp the amount of matter in an object
- cq an objective observation that cannot be contradicted; a close agreement between competent observations who make a series of observations of the same phenomenon