Save
or

or

taken

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.

focusNode
Didn't know it?
click below

Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

Normal Size     Small Size show me how

# Motion definitions

### AQA A level physics

TermDefinition
Efficiency The ratio of useful energy transferred by a device to the energy supplied
Centre of gravity The point through which all of a bodies weight acts
Acceleration – Equation and definition a=(v-u)/t, Change in velocity per unit time
Displacement Distance travelled in a given direction
Equilibrium State of an object at rest or in uniform motion
Conditions for equilibrium Resultant force zero & resultant torque zero.
Inertia Resistance of a body to changes in its motion
Kinetic energy Energy of a body due to its motion, 1/2 mv^2
Newton’s first law An object remains at rest of in uniform motion unless it is acted upon by a force
Newton’s second law (constant mass) Resultant force = mass x acceleration
Principle of moments Object in equilibrium: sum of clockwise moments about any point equals the sum of the anticlockwise moments
Terminal speed Max speed. The resultant force (of drag and weight) is equal to zero
Torque of a couple The total force x perpendicular distance between the line of action of the forces
Moment of a force about a point Force x perpendicular distance between the line of action of the force and the point
Work Force x distance moved in the direction of the force
Free fall The force due to gravity is the only force acting on an object
Assumptions for projectiles Air resistance is said to be negligible and the horizontal velocity is constant
Significance of a closed triangle of vectors Resultant force is zero / Forces in equilibrium
Created by: JamesMoly

Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

• SPACEBAR - flip the current card
• LEFT ARROW - move card to the Don't know pile
• RIGHT ARROW - move card to Know pile
• BACKSPACE - undo the previous action

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
 "Know" box contains: Time elapsed: Retries:
restart all cards