Pregunta 1
Pregunta
A soccer player runs 10.0[left], stops, sprints 25.0m[right] and then 8.5m[left]. His displacement from his original position is:
Respuesta
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6.5 m[left]
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43.5 m[left]
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6.5 m[right]
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43.5 m[right]
Pregunta 2
Pregunta
A penny is dropped from rest from a tower that is 0.553 km tall. What is the velocity of the penny right before it hits the ground?
Respuesta
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10.800 m/s
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104 m/s
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9.81 m/s
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3.29 m/s
Pregunta 3
Pregunta
A ball is thrown straight into the air from a roof with an initial speed of 6.00 m/s. The ball reaches the ground in 3.35 s. The final velocity and height of the roof are:
Respuesta
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26.9 m/s, 75.1 m
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38.9 m/s, 55.0 m
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26.9 m/s, 35.0 m
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32.9 m/s, 35.0 m
Pregunta 4
Pregunta
A baseball is thrown 30 m[W] from the third base to the second base. It is then thrown 30 m[N] to the first base. What is the resultant displacement?
Pregunta 5
Pregunta
What variable is always the same for the horizontal and vertical components of projectile motion?
Respuesta
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final velocity
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time
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initial velocity
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acceleration
Pregunta 6
Pregunta
A cannonball is fired horizontally at a speed of 120 m/s from a tower that is 50.0 m high. The time it would take for the cannonball to hit the ground would be [blank_start]4.95[blank_end] s.
(three sig digs)
Pregunta 7
Pregunta
Label the graphs for the different kinds of motion
Respuesta
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going up in a curve
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going up
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straight line
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equals 0
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going up
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straight line
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equals 0
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equals 0
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straight line
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going up
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going up in a curve
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going up
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straight line
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going up in a curve
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equals 0
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going up in a curve
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straight line
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going up
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going up in a curve
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equals 0
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straight line
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going up in a curve
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going up
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equals 0
Pregunta 8
Pregunta
Fill in the blanks for the types of forces:
Net force: [blank_start]Vector sum of forces acting on an object[blank_end]
Normal force: [blank_start]Force that is perpendicular to a surface[blank_end]
Applied force: F[blank_start]orce that goes w the direction of motion[blank_end]
Friction force: Fo[blank_start]rce that opposes the direction of motion[blank_end]
Tension force: [blank_start]Force that comes from other source[blank_end](eg.rope)
Gravitational force: [blank_start]Force that attracts objects together[blank_end]
Respuesta
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Vector sum of forces acting on an object
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Force caused by microscopic welds
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Force that is perpendicular to a surface
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orce that goes w the direction of motion
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rce that opposes the direction of motion
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Force that comes from other source
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Force that attracts objects together
Pregunta 9
Pregunta
A racecar is timed as it passes two points on a race track. Its speed at those two points is 43.2 m/s and 68.7 m/s. If the car requires 2.00 s to travel between these two points, its acceleration(rounded to 3 significant digits) would be [blank_start]12.8[blank_end] m/s^2
Pregunta 10
Pregunta
Y-intercept of...
Displacement-time graph: [blank_start]Initial position[blank_end]
Velocity-time graph: [blank_start]Initial velocity[blank_end]
Acceleration-time graph: [blank_start]Initial acceleration[blank_end]
The area under the curve of...
Displacement-time graph: [blank_start]N/A[blank_end]
Velocity-time graph: [blank_start]Displacement[blank_end]
Acceleration-time graph: [blank_start]Velocity[blank_end]
Slope of a...
Displacement-time graph: [blank_start]Velocity[blank_end]
Velocity-time graph: [blank_start]Acceleration[blank_end]
Acceleration-time graph: [blank_start]N/A[blank_end]
Respuesta
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N/A
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Displacement
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Velocity
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Position
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Initial position
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Initial velocity
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Initial acceleration
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Initial velocity
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Initial displacement
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Initial acceleration
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Initial acceleration
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Initial velocity
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Initial position
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Displacement
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Acceleration
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Velocity
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Velocity
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Displacement
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N/A
-
Velocity
-
Position
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N/A
-
Acceleration
-
Velocity
-
Displacement
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N/A
-
Velocity
-
Position
Pregunta 11
Pregunta
A block is moved up a frictionless inclined plane by a force parallel to the plane. At the foot of the incline, the block is moving at 1.00 m/s. At the top of the incline, 0.850 m above the lower end, the block is moving at 4.00 m/s. The block has a mass of 1.20 kg. So that must mean that the block had [blank_start]19.0[blank_end] J of work done on it.