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Buzz in when you are done with the Do Now…

Buzz in when you are done with the Do Now…. I’m done!!!. 0 of 30. 1a. Bob and Sally are the same mass . They are standing on frictionless ice. If they push each other, which person experiences the larger FORCE? . Bob Sally Same force Not quite sure . 0 of 30.

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Buzz in when you are done with the Do Now…

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  1. Buzz in when you are done with the Do Now… • I’m done!!! 0 of 30

  2. 1a. Bob and Sally are the same mass.They are standing on frictionless ice. If they push each other, which person experiences the larger FORCE? • Bob • Sally • Same force • Not quite sure 0 of 30

  3. 1b. Bob and Sally are the same mass.They are standing on frictionless ice. If they push each other, which person experiences the larger ACCELERATION? • Bob • Sally • Same acceleration • Not quite sure 0 of 30

  4. 2a. Bob and Sally are standing on frictionless ice. Bob has GREATER MASS than Sally.If they push each other, which person experiences the larger FORCE? • Bob • Sally • Same force • Not quite sure 0 of 30

  5. 2b. Bob and Sally are standing on frictionless ice. Bob has GREATER MASS than Sally. If they push each other, which person experiences the larger ACCELERATION? • Bob • Sally • Same acceleration • Not quite sure 0 of 30

  6. 3a. Earth and the moon are “connected” to each other by a gravitational force. If the action force is Earth pulling on the moon, what is the reaction force? • Gravity pulling moon • Sun pulling moon • Earth pulling moon • Moon pulling Earth • Answer isn’t up here • Not quite sure 0 of 30

  7. 3b. Earth and the moon are “connected” to each other by a gravitational force. Which is the greater force: moon pulling on the Earth, or Earth pulling on the moon? • Moon pulling Earth • Earth pulling moon • They are the same force • Answer isn’t up here • Not quite sure 0 of 30

  8. Quiz – make corrections! Ask for clarification! When done, work on POGIL… check in and/or borrow key • B • C • C • D • D • 6. F • F • C • B • No, you cannot conclude that no forces are acting on the moving object… you can only conclude that any forces acting on it cancel for a net force of zero. If it is moving and has no acceleration, this means the velocity is constant – which, according to either the 1st or 2nd laws, means the net force is zero.

  9. HW– make corrections! Ask for clarification! • Yes – a force is exerted on the nail. An equal force is on the hammer. There is a PAIR (2) forces. • Equal • You push back on floor, floor pushed forward on you…this is why it’s easier to walk on a surface with more friction (ex – sidewalk vs ice) • Water pushes you forward • Arrow pushing on bowstring • The Earth’s mass is MUCH larger than yours • Cannon Cannonball [same force, but cannon has much less acceleration] ma = F = ma 8. Rocket pushes gas back, gas pushes rocket forward

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