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Welcome to Work/Energy/Power JEOPARDY KEYBOARDING

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Final Jeopardy Question Horizontal Problems Components 100 Relative Velocity 500 400 300 200 100 200 300 400 500 Projectiles Launch at An Angle

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Which of the following plays a determining factor in the time of travel for a projectile? a.Horizontal speed b.Horizontal displacement c.Vertical displacement d.Acceleration due to gravity Back Horizontal Problems 100 pts

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C and D Back Horizontal Problems 100 pts Answer

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Which of the following remains unchanged as an object travels along a trajectory? a.Vy, b. Vx, c. Y position, d. X position, e. a x f. a y Back Horizontal Problems 200 pts

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Back Horizontal Problems 200 pts V x, a x, a y

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Back Predict the path of an object dropped from an airplane would take. A. B. C. D. E.

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Back Horizontal Problems 300 pts A.

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Back Horizontal Problems 400pts An object is thrown off a 20 m cliff with a Velocity of 2 m/s. How much time was the Object in the air?

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Back Horizontal Problems 400 pts Answer 2s

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Back Horizontal Problems 500 pts An object is thrown off a 10 m cliff with a Velocity of 2 m/s. How for does it move in the horizontal direction?

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Back Horizontal Problems 500pts Answer 4m

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A runner moves 3 km E and then 4 km N. What is the runners displacement? Back Components 100pts

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5km at 53 degrees. Back Components 100 pts

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Back Components 200 pts A person is shot out of a cannon with an initial Velocity of 3m/s at an angle 20 degrees. Determine the components a.Vx b.Vy

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Back Components 200pts Answer Vx = 2.8 Vy = 1.02

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A airplane flies with a speed of 40 m/s 20 NE. What is the Northern component? Back Components 300pts

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Back Components 300 pts 13.7m/s

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Back What are the acceleration components for a projectile? Components 400 pts

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Ax = 0 m/s/s Ay = 9.8 m/s/s Back Components 400 pts Answer

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Back Components 500 pts What are the velocity components at the Top of a trajectory for an object launched At an angle of 20 degrees with an initial Velocity of 35m/s?

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Back Componetns 500 pts Answer Vx = 16.4m/s Vy = 0

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Describe what happens to the velocity components of an object launched at an angle as it travels along its trajectory. Back Projectiles At an angle 100 pts

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The horizontal component remains Unchanged, and the vertical Component changes at a rate of 9.8 m/s every second towards the earth Back Projectiles 100 pts Answer

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Back Determine the total time a projectile is in the Air if it was shot at a 45 degree angle with an initial velocity of 22 m/s landing at the same Height it started? Projectiles 200pts

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Back Use y-yi = 0 =vyi*t + 1/2gt^2 t= 2Vyi/g =3.4 s Projectiles 200pts Answer

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Back Projectiles 300pts Determine the range of a project if it was shot at a 45 degree angle with an initial velocity of 22 m/s landing at the same Height it started?

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Back Projectile 300pts Answer X-Xi = Vx t X = (22 cos 45)(3.4s) X =620 m

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Back Projectiles 300 Determine the max height of a projectile if it was shot at a 45 degree angle with an initial velocity of 22 m/s?

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Projectile 400pts Y-0 = -Vyi 2 /2g or Y-0 = Vyi*t 1/2 g t 1/2 2 Y = -(22Sin45) 2 /2g =12.34 m Back

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Projectile 500 pts Determine the total time and range of a projectile shot from a 20 m high cliff at a 45 degree angle with an initial velocity of 22 m/s landing on the ground below?

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Time = X-Xi = Back

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A man walks east at 5m/s on a moving walkway that is moving 3m/s east. What is the mans velocity relative to a stationary observer? Back Relative Velocity 100 pts

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8m/s? Back

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A man walks at a speed of +4 m/s relative A man who is walking towards him moving At -1 m/s relative to a stationary observer. What is the firsts mans speed relative to the Stationary observer? Back

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Relative Velocity 200 pts +3m/s

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A boat in still water takes 40 s to cross a 30m wide river. If the current in this river is moving downstream at 1m/s what is the boats velocity relative to a person standing on the shore? Back

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1.25 m/s at 53 SE

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Back Two men moving at 6m/s step on to a moving walkway on opposite ends. The velocity is 4m/s east and is 10m long. What is the relative speeds of the men with respect to a stationary observer?

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10 m/s east 2 m/s west Back

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Two men moving at 6m/s step on to a moving walkway on opposite ends. The velocity is 4m/s east and is 10m long. How much time does it take for the men to meet?

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Back 8.3m.