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  • What is acceleration? (article) | Khan Academy
    Check out the accelerations in the diagram below, where a car accidentally drives into the mud—which slows it down—or chases down a donut—which speeds it up Assuming rightward is positive, the velocity is positive whenever the car is moving to the right, and the velocity is negative whenever the car is moving to the left
  • Khan Academy
    Oops Something went wrong Please try again Uh oh, it looks like we ran into an error You need to refresh If this problem persists, tell us
  • Acceleration (video) | Khan Academy
    Acceleration is the rate of change of velocity (a = Δv Δt) The unit for acceleration is m s s, or m s^2 Acceleration is a vector with magnitude and direction If velocity and acceleration point the same direction, the object is speeding up If velocity and acceleration point opposite directions, the object is slowing down Changing direction is also a form of acceleration
  • Acceleration (video) | Motion | Khan Academy
    Acceleration is change in velocity If an object's speed and or direction is changing, it is accelerating If an object is speeding up, its velocity and acceleration are in the same direction If an object is slowing down, its velocity and acceleration are in opposite directions If neither an object's speed or direction are changing, it's moving at constant velocity and its acceleration is zero
  • Oups. Il y a eu un problème. Sil vous plaît, veuillez reessayer.
    Oups Il y a eu un problème S'il vous plaît, veuillez reessayer Oups, on dirait qu'il y a eu une erreur ! Vous devez actualiser Si le problème persiste, dites-nous
  • Centripetal acceleration review (article) | Khan Academy
    Review the key concepts, equations, and skills for centripetal motion, including intuition for the direction of centripetal acceleration
  • Acceleration questions (practice) | Khan Academy
    An ambulance is currently traveling at 15m s, and is accelerating with a constant acceleration of 5 m s 2 The ambulance is attempting to pass a car which is moving at a constant velocity of 30m s How far must the ambulance travel until it matches the car’s velocity?
  • Uniform circular motion and centripetal acceleration review
    Review the key concepts, equations, and skills for uniform circular motion, including centripetal acceleration and the difference between linear and angular velocity
  • Connecting motion and forces (understand) (practice) | Khan Academy
    Check your understanding of forces and acceleration in this set of free, standards-aligned practice questions
  • Newtons third law (video) | Khan Academy
    Newton's third law states that forces always exist in equal and opposite pairs One object cannot exert a force on another without experiencing an equal magnitude force in the opposite direction Newton's third law applies even if the two interacting objects have different masses The equal and opposite forces in the pair do not cancel because they act on different objects





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