Physics Review

Kinematics

100

What is the difference between velocity and speed?

Velocity is a vector, and speed is not.

200

What does acceleration mean in terms of velocity?

Acceleration is the rate of change of velocity with respect to time.

300

How do you calculate average speed?

Average speed = Total distance / Total time

400

A ball is dropped from rest. How far will it fall in 3 seconds? (Assume g=10 m/s²)

The ball will fall 45 m in 3 seconds.

500

If an object moves 20 meters north and then 30 meters west, what is the total distance?

50 meters

Forces

100

What unit is force measured in?

Newtons (N)

200

What does Newton’s Second Law state? (Hint: F = ma)

Newton's Second Law of Motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.

300

How do balanced and unbalanced forces affect an objects motion?

Balanced forces on an object do not change its state of motion, while unbalanced forces cause a change in motion, like acceleration.

400

How does air resistance affect a falling object?

Air resistance opposes the motion of a falling object, slowing it on its way down. 

500

A car of mass 1000 kg accelerates from rest to 20 m/s in 10 seconds. What is the average net force exerted on the car

2000 N

Energy

100

What are the different forms of energy?

Kinetic, Potential, Thermal, Mechanical, Gravitational, Electrical, Chemical, Solar, Nuclear, and Sound.

200

How does energy transform from one form to another? (Give an answer for heat to light. Can be more than one answer!)

When a candle is lit, the heat from the friction of the match swiping against the match box creates a spark and creates light. Which can then light a candle and make is shine

300

True or False; Energy can be created or destroyed

False. 

400

What's the formula for kinetic energy?

KE=1/2mv²

500

What are three ways that work on an object can be zero?

1. If it doesn't move

2. 0 force

3. 90 degree angle

Waves

100

What is the highest point of the wave called?

The crest.

200

What is the lowest part of the wave called?

The trough.

300

What effect does this describe? 

Relative motion of the observer and source changes the observed frequency.
Toward each other=higher frequency
Away from each other=lower frequency

The Doppler Effect. 

400

What is constructive interference? What is destructive interference?

Constructive = Bigger Wave

Destructive = Smaller Wave

500

Give a possible formula for finding wavelength if you know the velocity and the frequency. 

V=(f)(lambda)

Formulas

100

What is the Pythagorean Theorem?

a²+b²=c²

200

What is the formula for work?

Work = Force X Distance

300

What formula represents Newtons second law?

F=MA

400

What is the formula for range?

Range = v_i²sin(2theta)/a

500

What is the formula for conservation of energy?

1/2mv_i²+mgh_i+1/2kx_i²=1/2mv_f²+mgh_f+1/2kx_f​²​​​​​​​