STAAR Review DAY 4 FORCE, MOTION, AND ENERGY

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STAAR Review DAY 4 FORCE, MOTION, AND ENERGY TEKS 8.6A (R), 8.6B (S), 6.8C (S), 6.7D (S) © Hedgehog Learning

Forces Consider the forces acting on these books. © Hedgehog Learning Gravity pulling downward Consider the forces acting on these books. Are the books moving? Are the forces balanced or unbalanced? Air pressure Air pressure Table pushing upward

Forces Balanced Forces - occurs when multiple forces acting on an objects does not cause an object to change its speed Unbalanced Forces - occurs when multiple forces acting on an object causes the object to increase or decrease speed Identify if these items are examples of BALANCED or UNBALANCED forces. Constant speed © Hedgehog Learning

Balanced or Unbalanced What is the net force acting on these objects? Will these objects change speed? 2 N 15 N NET: 2 N Forward NET: 10 N Down 3 N 1 N 25 N 2 N © Hedgehog Learning

Speed, Velocity, and Acceleration Speed – the distance an object travels in a certain amount of time Velocity – the speed and direction of an object Acceleration – a change in velocity An airplane flies from Dallas to Boston, a distance of 1500 miles, in 4 hours. Describe the flight of the airplane in terms of average speed and velocity. When does the airplane accelerate? © Hedgehog Learning

Speed, Velocity, and Acceleration Speed – the distance an object travels in a certain amount of time Velocity – the speed and direction of an object Acceleration – a change in velocity Average Speed: 375 miles/hour Velocity: 375 miles/hour to the northeast Positive acceleration occurs at takeoff; Negative acceleration occurs at landing © Hedgehog Learning

© Hedgehog Learning

© Hedgehog Learning

© Hedgehog Learning

E D I H F B A G C © Hedgehog Learning