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Motion Revisited
What is your name?
Your answer
What is the force that prevents something from invading another's space?
Choose
Natural
Friction
Normal
Sliding
Tension
Applied
If a ball is thrown in the air and stays in the air for 3.2 seconds, and you want to know how high it went, what formula would you use first?
Vf = Vo + at
Vf2 = Vo2 + 2ax
x = 1/2(Vo + Vf) t
x = Vo(t) + 1/2 a(t)squared
F=ma
Ac = V2/r
V = 2 x pi x r
Clear selection
If a 2kg ball hits a wall at 32 m/s/s and you want to know the force acting on the ball, what formula would you use?
Vf = Vo + at
Vf2 = Vo2 + 2ax
x = 1/2(Vo + Vf) t
x = Vo(t) + 1/2 a(t)squared
F=ma
Ac = V2/r
V = 2 x pi x r
Clear selection
What is the least amount of data you need to determine the distance a ball lands from a cliff after it rolls horizontally off that cliff?
mass and gravity
vertical velocity and time in air
horizontal velocity and distance to ground
horizontal velocity and time in air
mass, gravity, height of cliff
gravity and horizontal velocity
acceleration of ball, vertical velocity and height of cliff
Clear selection
How is inertia determined?
Choose
mass x gravity
acceleration over time
mass only
acceleration only
vertical force
horizontal velocity
resultant velocity
Option 8
If a person was swimming across a river, how far down the river would the person go before they reached the far side? swim speed = 2m/s; time to cross river = 3 seconds; distance across river = 12m; mass of swimmer = 40kg; river speed = 2m/s
12m
6m
8.5m
16m
5.44m
Not enough info provided
Clear selection
What is the opposite force of the force needed to pull a block up a slope?
Gravity
weight
Sliding Friction
Normal force
Tension
Centripetal
George Lucas
Clear selection
If the force downwards on a book on a table is 12N and it is being pushed to the left with a 5N force and there is a sliding friction force of 2N, what is the mass of the book?
3N to the left
12 grams
The acceleration of gravity x the normal force
35 kg
1.2 grams
122 kg
Normal force minus gravity
1.22 kg
5N to the left
Equilibrium
Clear selection
What formula would you use to determine the angle that a block will move? It has a westward force of 12N and a southward force of 9N.
Choose
a squared plus b squared = c squared
Sin (12) = Unknown/9
Cosine(angle) = Adjacent/Hypotenuse
Sin(angle) = Opposite/Hypotenuse
Vf = Vo + at
Cosine(opposite) = hypotenuse/Angle
Tan(angle) = opposite/adjacent
If a rocket is launched at a 35 degree angle at an initial velocity of 12m/s, what would you do to determine how far it will go before it hits the ground?
Choose
determine the time time its in the air, use that and multiply it times 12m/s
seperate into H-velocity and V-velocity, then find time in air, then use time and H-velocity to determine distance
Use SOH CAH TOA to determine the distance using the angle and the Hypotenuse(Resultant)
Use SOH CAH TOA to determine the time in air and multiply that by 12m/s
seperate into H-velocity/V-velocity, use the H-velocity to get the time in air and multiply the time air times the V-velocity to get the distance
Use Cosine(35) = distance/12
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