forces and motion

• Work done


  force × distance moved in the direction of the force

  W= Fs
• K.E. = 1/2 m v2 


  Kinetic energy = 1/2 x mass x velocity squared
• Which of these is a contact force


  Friction
• What are the units for weight


  Newtons (N)
• What is the correct equation for speed


  Speed= distance / time
• What is an example of non-contact forces


  Magnetic
• The unit for mass are


  Kg
• There unbalanced

  
• What is a resultant force?


  The overall net force acting upon an object
• What quality is a vector?


  weight
• What does the gradient of the line represent on a distance time graph?


  Speed
• What is the gravitational field strength on earth?


  10N/Kg
• Calculate the mass if the weight on Earth is 34N


  3.4Kg
• What is the difference between speed and velocity 


  Velocity is speed in a given direction
• What does stationary mean

  Not moving
• What is the total resistance force

  0N

  
• If the cyclist was to get faster, which force would be the biggest?

  Driving force

  
• What does a horizontal line in a distance-time graph show?

  Stationary
• Gravity is an example of what

  A non-contact force
• What does a steep line in a distance-time graph show?

  Fast moving
• Braking in a car converts


  Kinetic energy to heat and sound
• How does speed affect the thinking distance?


  Higher speed, longer thinking distance
• to measure reaction times you could


  Drop a ruler for a partner, measure the distance the ruler drops, convert distance into time
• For every action there is an equal an opposite reaction. What law is this?


  Newton's Third Law
• What is newtons second law


  force= mass x acceleration
• factors like tiredness, alcohol, drug affects


  thinking distance
• Which of the quantities below is a scalar?


  Distance