PhysicsBalanced and Unbalanced Forces; Speed, Velocity and Acceleration; and Newton’s 3 Laws of Motion.

Balanced and Unbalanced ForcesWhich way is the box going to move? ____right___________ and _____up_________ What is the net force?_2N right and 7N up______

27 N 25 N

7N

Speed, Velocity and AccelerationWrite the correct vocabulary word on the line.

1. speed plus direction (N, S, E or W) _____velocity_________

2. rate of change in velocity – Speeding up, slowing down, changing direction acceleration

3. the rate at which an object moves ___speed________

Write speed, velocity or acceleration in the box that matches the scenario.

speed Two runners ran the same distance (10km) but one completed it in 3600 seconds and the other in 2800 seconds.

speed Spirit of Australia, a hydroplane boat, made speed records by traveling 239 miles in 0.75 hours (45 minutes).

velocity A runner is running east at 10 m/s.

velocity You’re rowing a boat upstream at 15 km/hr, against a current moving at 8 km/hr.

acceleration You are driving a car and making a left hand turn to the school.

Calculating Speed and Motion GraphsUse the formula to calculate the speed of the objects. Be sure to include the correct unit.

a. A toy train went around a 6m track in 3 minutes. __2 m/m_____

b. A student ran the 200m track in 2 minutes. _____100 m/m______

c. An airplane flew for 500 km in 20 minutes. _____25 m/m______

Write Newton’s 3 Laws of Motion

The Law of Inertia – an object wants to continue to do what it is doing unless an unbalanced force acts on it. Rest… stay at rest. In motion… stay in motion at the same speed and direction unless an unbalanced force acts on it. An unbalanced force will change an objects speed and/or direction

The Law of Force and Acceleration – f=ma… the greater the force, the greater the acceleration, the greater the mass the greater the force needed for the same acceleration.

The Law of Action-Reaction – for every action there is an equal and opposite reaction

Write which one of Newton’s 3 Laws describes the picture/situation below.

This is Newton’s 3rd Law This is Newton’s 2nd Law This is Newton’s 1st LawWhy? Why? Why?

ChemistryAtomic Structure, Reading the Periodic Table, Chemical Reactions and Formulas and Equations.

Subatomic Particle Location Charge Mass

Proton nucleus Positive 1 amu

Neutron Nucleus Neutral 1 amu

Electron Electron cloud Negative 0 amu

Force comes out gun in front and walle moves backwards in the opposite direction

Golf ball is at rest until the force of the club makes it accelerate.

Person in the car keeps moving because the force stopping the car does not act on the person.

Identify the Element based on the models categorize each as a metal, nonmetal, etc.

__Boron___ ___Lithium___ __Neon_ __Sodium__

_non metal/mettaloid_ __metal___ _non metal/noble gas_ _metal/ alkali metal_

Fill in the chart for these elements

Element Atomic # Protons Neutrons Electrons Atomic Mass

Helium 2 2 2 2 4

Berylium 4 4 5 4 9

Fluorine 9 9 10 9 19

Sodium 11 11 12 11 23

Reactivity is based 100% on what? ____valence electrons______________________

Why are groups 1 and 17 more reactive than groups 2 and 16? The only need to get 1 or give 1 electron to complete its valence shell, while groups 2 16 need to give or take 2 electrons to complete their valence shell.

Why are the Noble Gases (Group 18) stable? The valence shell is complete and full.

The table below lists three characteristics of an atom of an element.Characteristics of an Element

Number of Protons

Number of Neutrons

Number of Valence Electrons

37 48 1

An atom of which element is described by the data in the table?A Radon

B Cadmium

C Rubidium

D Astatine

The diagram shows a homemade car being pushed with a force of 25 N.

The force causes the car to move at a constant speed of 3 m/s. What will happen if the force is changed to 35 N?

F The car will move at a constant speed of 13 m/s.

G The speed of the car will not change.

H The speed of the car will increase.

Motion

of car

Force = 25 N

J The speed of the car will decrease to 1 m/s.

Four students were asked to classify the activities of the people in the picture below as examples of either potential or kinetic energy.

Which student correctly classified the activities?

Student 1 Student 3

F H

Student 2 Student 4

Activity Observed

Classification of ActivityGirl swimming

laps Potential energy

Boy on diving board Kinetic energy

Girl hitting volleyball Potential energy

Boy holding volleyball Kinetic energy

Activity Observed

Classification of ActivityGirl swimming

laps Kinetic energy

Boy on diving board Kinetic energy

Girl hitting volleyball Potential energy

Boy holding volleyball Potential energy

Activity Observed

Classification of ActivityGirl swimming

laps Potential energy

Boy on diving board Potential energy

Girl hitting volleyball Kinetic energy

Boy holding volleyball Kinetic energy

Activity Observed

Classification of ActivityGirl swimming

laps Kinetic energy

Boy on diving board Potential energy

Girl hitting volleyball Kinetic energy

Boy holding volleyball Potential energy

The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical reactivity?

A The element is sodium, and it is highly reactive.B The element is fluorine, and it is not very reactive. C The element is sodium, and it is not very reactive. D The element is fluorine, and it is highly reactive.

The diagram below shows two different forces acting on a cyclist riding a bicycle.

The total mass of the cyclist and the bicycle is 100.0 kg. Based on this information, what is the acceleration of the cyclist?

A 0.66 m/s2 backward, because the force of the air slows the cyclist down

B 0.66 m/s2 forward, because the applied force is greater than the force of the air

C 2.3 m/s2 backward, because the forces are opposite and not equal

D 2.3 m/s2 forward, because the cyclist’s inertia is greater than the force of the air