The formula for speed is?

Speed = distance divided by time. v = d t

The units for speed could be ____ or ____?

meters per second m/s or kilometers per hour km/h

What is the difference between speed and velocity?

Speed is the rate of motion, which is distance divided by time Speed is the rate of motion, which is distance divided by time. Velocity is the speed plus direction

What is the formula for average speed?

Average speed = total distance total time aver. v = total d total t

What is the average speed

aver. v = total d total t aver. v = 100 m 4 s aver. v = 25 m/s

What is the formula for acceleration?

a = ∆v = vf - vi t _________ t

What are the units for acceleration?

m/s2 or km/h2

Would these be positive accleration or negative accleration Would these be positive accleration or negative accleration ? (deceleration) v v t t

positive a deceleration v v t t

Motion is all relative to a ____ point

Reference point!

What would be the resultant speed if a person walks to the back of a bus at 5 m/s while the bus moves forward at 25 m/s?

Bus moves at 25 m/s person moves 5 m/s the opposite way Bus moves at 25 m/s person moves 5 m/s the opposite way. 25 – 5 = 20 m/s forward

A push or a pull is a ___?

Force

The unit for force is ____ and the equipment to measure force is a ___ ___?

Newton and spring scale

A tug of war game where no one moves represents what type of forces?

Balanced

A gust of wind that knocks over a vase of flowers is what type of force?

Unbalanced

The resistance to change motion or being at rest describes what term?

Inertia

An object at rest will stay at rest and an object in motion will stay in motion until a net force acts on it is known as which of Newton’s Laws?

Newton’s 1st law of motion or the law of inertia

Two surfaces that rub against each other opposing motion is ___?

Friction

Which has the greatest friction and which has the least friction Which has the greatest friction and which has the least friction? Static, Sliding, or Rolling

Static has the greatest and rolling has the least

Swimming in water is an example of what type of friction?

Fluid friction

Waxes, oils, and soap are examples of ___?

Lubricants

Adding obstacles, roughing up surfaces, or adding gritty material are all ways to increase or decrease friction?

Increase friction

What reduces friction?

Lubricants

3 forces that slow an object in constant motion are?

Gravity Friction Air Resistance

The force of air that opposes motion is called?

Air resistance

The attraction between 2 objects is known as ___?

Gravity

The law of gravitation depends on what 2 things?

Mass and distance The greater the mass the greater the gravitational pull The greater the distance the less the gravitational pull

The number of atoms or the amount of matter an object is made of is known as ___?

Mass

The pull of gravity on the mass of an object is ___?

Weight

Which would change on the moon, mass or weight?

Weight because the moon has 1/6 the gravity thus your weight would be 1/6 of what it would be on Earth.

The relationship between Force, mass, and acceleration is which of Newton’s laws?

Newton’s 2nd law

Forces that are equal in size and opposite in direction states which of Newton’s laws?

Newton’s 3rd law

If an object falls from the top of the building which is 19 If an object falls from the top of the building which is 19.6 m/s2 in 2 seconds, what is its rate of acceleration due to gravity?

All objects fall to the earth with the same acceleration due to gravity 9.8 m/s2

A type of velocity that describes how an airplane traveling from NY to California travels parallel to the earth surface ?

Horizontal velocity

A type of velocity that occurs when an object falling reaches its maximum velocity or when gravity is equivalent to air resistance?

Terminal velocity

A rocket shooting straight up, perpendicular, to the Earth’s surface describes this type of velocity?

Vertical velocity

Describe all the forces and types of velocities that occur when a person throws a baseball and it starts to curve downward?

Horizontal velocity parallel to the Earth, then air resistance pushes against it and gravity pulls down, last as the object falls straight down vertical velocity.

p = mass x velocity represents the formula for what?

Momentum.

The unit for momentum is?

Kg x m/s with a direction mass is kg and velocity is m/s.

Which would have more momentum, a ping pong ball or a bowling ball both traveling at the same speed? Why?

A bowling ball, because it has more mass.

The amount of momentum you start with will be the same after a collision is known as the law of ___ .

The law of conservation of momentum.