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Name: _________________________ ____ / Science/ Classwork Date: ___________________ Work Hard. Be Nice. CW27-It’s a Balancing Act Notes:

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  1. Name: _____________________________ / Science/ ClassworkDate: ___________________ Work Hard. Be Nice.CW27-It’s a Balancing Act Notes: • When more than one force acts on an object, the forces _______________ to form a ________________ _________________. • Forces may _____________________ or _______________________. • If the effects of the forces cancel each other out, and do not cause an object to move, the forces are said to be _______________________. • If the forces don’t cancel each other out – 1 force is stronger than the others – the forces are _________________ and will cause a _______________________. • The strength of a force is measured in _____________ (___) Examples: • Two forces ____________________ can _____ together to produce a LARGER net force. ______ _____ _____ • Two forces ____________________ can ___________ to produce a SMALLER net force in the direction of the larger force. ______ _____ _____ • Two forces may ______________________________ and produce NO NET FORCE. ______ _____ _____ + = + = + = 0

  2. FORCES Practice Problems Name:_______________________ _______/Science/ClassworkDate: ________________________ Work Hard. Be Nice. • Circle the best answer: • The forces shown above are PUSHING / PULLING forces. • The forces shown above are WORKING TOGETHER / OPPOSITE FORCES. • The forces shown above are EQUAL / NOT EQUAL. • The forces DO / DO NOT balance each other. • The net force is 1000 N TO THE RIGHT / 1000 N TO THE LEFT / ZERO. • There IS / IS NO motion. • Circle the best answer: • The forces shown are PUSHING / PULLING forces. • The forces shown are WORKING TOGETHER / OPPOSITE FORCES. • The forces shown above are EQUAL / NOT EQUAL. • The forces DO / DO NOT balance each other. • The stronger force is pulling RIGHT / LEFT. • Motion is the to the RIGHT / LEFT.

  3. Two movers are trying to move a heavy box. One mover pushes to the right with a force of 150 N. The other mover pushes to the left with a force of 200 N. • a) Draw & label the forces on the diagram. • b) What is the net force? _______________ • c) Will the box move? __________________ • If yes, in what direction? _______________ • If no, why not? _______________________ • Two movers are trying to move a heavy chair. One mover PULLS to the left with a force of 200 N. The other mover PUSHES to the left with a force of 200 N. • a) Draw & label the forces on the diagram. • b) What is the net force? _______________ • c) Will the chair move? _________________ • If yes, in what direction? ________________ • If no, why not? ________________________ • Four children are fighting over the same toy. Mike is pulling North with a 50 N force, Justin is pulling East with a 40 N force, Chantal is pulling South with a 50 N force, and Tykera is pulling West a 30 N force. • a) Draw & label the forces on the diagram. • b) Is there a net force on the toy? ____________ • c) In which direction will the toy move? ________ • d) Who gets the toy? _______________________

  4. Name_____________________ _________/ Science/Homework Date______________________ Work Hard. Be Nice. HW 28- Force Practice Problems • 1. Harry the hippo decides to go skydiving for his birthday. Gravity is pulling him down with a force of 1000 N. Air resistance is pushing up on his parachute with a force of 800 N. • Draw and label the forces on the diagram. • What is the net force? __________________ • Are there balanced or unbalanced forces? • In which direction is Harry moving? _________ • 2. Shaun is the star of his middle school basketball team. Unfortunately, while playing in the championship game, his foot slips on the floor. He slides to the left with a force of 200 N. The force of sliding friction between his shoe and the floor is 200 N. • Draw and label the forces on the diagram. • What is the net force? __________________ • Will Shaun keep sliding? _________ • If yes, what direction? • If no, why not? Fill in the blanks below to complete each force diagram. 60 N 200 N 50N ____ N Net force = 20 N Direction: Up 60 N 150 N 125 N Net force = _______ Direction: ________ Net force = _______ Direction: ________

  5. Name_____________________ _________/ Science/Homework Date______________________ Work Hard. Be Nice. Exit Ticket 28- Force Problems • 1. Harry N. • Draw and label the forces on the diagram. • What is the net force? __________________ • Are there balanced or unbalanced forces? • In which direction is Harry moving? _________

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