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Make sure your practice test is in the bin. Complete the Mid-Year Teacher Survey. DO NOW
Important Dates & Reminders Round Four Practice Test Should Be in Bin! Round Four Unit Exam TOMORROW Science Expo Projects Due TOMORROW Science Expo is on Thursday – Extra Credit for Coming! No December Monthly News Project Extra Credit Projects Due Next Mon
Ms. Kemal’s Physics Jeopardy
THE RULES: • Give each answer in the form of a question (i. e. “What is…”) • Instructor/Host’s decisions are FINAL
And now…here is the host of Jeopardy… Ms. Kemal
Let’s Get Ready to play… Today’s Categories are:
Circular Motion
Torque
Momentum
Collisions
Mystery Bag
Circular Motion Torque Momentum Collisions Mystery Bag $100 $100 FJ $200 $200 $300 $300 $400 $400 $500 $500 DD
This is the three-word phrase that describes when an object is moving in a circle at constant speed Answer…
Uniform Circular Motion 100
The direction of acceleration when an object is moving in a circle Answer…
Inward/Towards the center 200
The direction of velocity when an object is moving in a circle Answer…
Tangent to the circle 300
Calculate the centripetal acceleration for a yo-yo with a radius of 0. 7 m being swung with a velocity of 3 m/s. Answer…
12. 8 m/s 2 400
Calculate the centripetal force for a 2. 3 kg bucket that is tied to a 1. 8 m long string and is moving at a speed of 3. 7 m/s. Answer…
17. 5 N 500
Torque causes objects to do this Answer…
Rotate 100
If an object is rotating clockwise, it has a ______ torque. (positive or negative) Answer…
Negative 200
Suppose the force on the wrench is 45. 0 N and the lever arm is. 10 m. The angle (θ) between the force and lever arm is 30. 0°. Calculate the torque. Answer…
2. 3 N*m 300
The torque working on an object that has a 95 N perpendicular force acting 1. 3 m from its center of mass Answer…
123. 5 N*m 400
Two kids are on a see saw. If kid A weighs 300 N and is 4. 5 m from the center, and kid B weighs 450 N, where should kid B sit so that they are perfectly balanced? Answer…
3 m 500
Momentum depends on these two things Answer…
Mass and Velocity 100
The unit for momentum Answer…
Kg*m/s 200
The momentum of a 412 kg boulder rolling at 5. 7 m/s Answer…
2348. 4 kg*m/s 300
The conservation of momentum tells us that the total momentum before a collision is ______ to the total momentum after a collision Answer…
Equal to 400
The momentum of a 110 -kg child at rest Answer…
0 m/s 500
The type of collision that has objects separate aftewards Answer…
Elastic 100
The type of collision where both objects move together after the collision Answer…
Inelastic 200
If something is going to the left or in the opposite direction, what we must add to its velocity Answer…
A negative sign 300
A 4 -kg cart traveling east at 5 m/s hits a 4 -kg cart at rest and sticks to it. Calculate the speed of the carts after the collision when they are stuck together. Answer…
2. 5 m/s 400
A 3 kg ball is travelling to the right at 6 m/s and a 5 kg ball is traveling to the left at 8 m/s. They collide and stay stuck together. What is their final velocity? Answer…
-2. 8 m/s 500
Sticky collisions are called this Answer…
Inelastic 100
This two-word term describes the distance of the force applied from the point of rotation Answer…
Lever arm 200
A car weighing 3, 500 N is parked on a bridge. How much torque is it applying to the support that is 15 m away? Assume a perpendicular angle Answer…
52, 500 N*m 300
This angle provides the greatest torque Answer…
90 o angle/right angle 400
The centripetal force for a 4 kg tetherball swinging on a 2. 5 m long rope at a speed of 6 m/s Answer…
57. 6 N 500
Daily Double How much do you want to wager? Daily Double
FINAL JEOPARDY
CATEGORY: Elastic Collisions How much do you want to wager? Proceed…
A 3 kg ball rolls at 5 m/s and a 6 kg ball rolls at 3 m/s in the opposite direction. They collide. After the collision, the 6 kg ball rolls at 2 m/s in the positive direction. What is the final velocity of the 3 kg ball? Proceed…
-5 m/s Proceed…
Thanks for PLAYING!