movement and position

• What is speed?

  Speed is the distance travelled by an object per second
• What is velocity?


  Velocity is the speed of an object in a particular direction.
• What is displacement?

  Displacement is the distance travelled in a particular direction.
• What is acceleration?

  Acceleration is the rate of change of velocity
• What is a scalar quantity?

  A scalar quantity is a quantity that has magnitude but no direction such as speed.
• What is a vector quantity?

  A vector quantity is a quantity that has both magnitude and direction
• In a velocity time graph what does a straight line represent?

  it represents constant acceleration.
• In a velocity time graph what does a flat horizontal line represent?

  it represents constant velocity.
• In a velocity time graph what does a changing slope represent?

  It represents changes in acceleration
• In a distance time graph what does a straight line represent?

  It represents constant speed
• In a distance time graph what does a flat horizontal line represent?

  it represents an object that is stationary.
• In a distance time graph what do curves represent?

  they represent changes in speed.
• What is a force?

  A force is a push or pull.
• How can a force affect a body?

  It can cause changes in :

  1. shape
  2. speed
  3. direction
• What is a resultant force?

  A resultant force is the total effect of two or more forces acting on an object.
• What is frictions?

  Friction is the force that opposes the motion of an object.
• What is Newtons First law?

  Newtons first law states that an object remains stationary unless a resultant/unbalanced force acts on it.
• What is Newtons second law?


  F=ma
• What is weight?

  weight is the force of gravity acting on a body.
• What does the weight that an object experiences depend on?

  It depends on the :

  1. objects mass
  2. The gravitational field strength the object is in
• What is mass?

  Mass is the amount of matter in a object.
• True false? Are the mass and weight of an object directly proportional?

  true.
• What's the relationhip between weight and gravitational field strength?

  The larger the gravitational field strength the larger the weight.
• What is Braking distance?

  the distance travelled under the braking force in metres (m)
• What is stopping distance?

  The total distance travelled during the time it takes for a car to stop during an emergency
• what is thinking distance?

  the distance travelled in the time it takes the driver to react (reaction time) in metres (m)
• What affects stopping distance?

  1. The speed of the vehicle
  2. the reaction time of the driver
  3. the road conditions
  4. the tire conditions
  5. the mass of the vehicle
• How do you calculate stopping distance?

  Stopping distance= thinking distance + breaking distance
• how do you calculate weight ?

  W=mg
• Whats the unit for weight?

  Newtons(N)
• Whats the unit for mass?

  Kg
• What's the unit for stopping distance?

  Metres(m)
• What is the gravitational field strength of Earth ?

  9.81m/s2
• Give 3 examples of scalar quantities.

  Volume, mass, and speed
• Give 3 examples of vector quantities.

  velocity, Displacement, and acceleration
• What are the 2 types of forces?

  contact and non- contact
• What is a non- contact force?

  A force between two objects that are not in physical contact.
• What is a contact force?

  A force between two objects that are in physical contact.
• What is terminal Velocity?


  Terminal velocity is the maximum speed that a moving object is able to reach .
• What two forces act on a falling object?

  1.Weight

  2. Air resistance