20403567
Descripción
Test por Ryan Elwell, actualizado hace más de 1 año
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Creado por Ryan Elwell
hace alrededor de 5 años
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Pregunta 1
Pregunta
Which of the following is the fundamental unit for a force?
Respuesta
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Meter
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kg*m/s
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m/s^2
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kg*m/s^2
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m*kg^2
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m*s/kg
Pregunta 2
Pregunta
Which of the following is Newton's Second Law?
Respuesta
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An object at rest will remain at rest until acted upon by an outside, unbalanced force
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Every force has an equal and opposite reaction force
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Energy cannot be created or destroyed, only transferred from one object to another
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The acceleration of an object is equal to the net force acting on it divided by the mass of the object
Pregunta 3
Pregunta
Which of the following is true for the force of gravity?
Respuesta
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On Earth, it is always directed straight down, toward the Earth's center
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It is always 9.8 m/s^2
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It is also referred to as an objects 'weight'
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It acts on all objects equally
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Keeping everything else the same, if you double an object's mass, you double the force of gravity acting upon it.
Pregunta 4
Pregunta
What is the force of gravity acting on an object with a mass of 2.5 kg?
Hint: You can use 10 m/s^2 for the acceleration due to gravity.
The first blank is for the value. The second blank is for the units.
F = [blank_start]25[blank_end] [blank_start]N[blank_end]
Respuesta
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25
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N
Pregunta 5
Pregunta
The force of [blank_start]friction[blank_end] is the force that resists all motion.
Respuesta
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friction
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gravity
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normal
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tension
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compression
Pregunta 6
Pregunta
Put the appropriate forces in the correct spot for this object, a box acceleration to the right due to an applied force.
Image:
Fbd (binary/octet-stream)
Respuesta
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Normal
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Gravity
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Friction
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Applied
Pregunta 7
Pregunta
What is the net force acting on this object?
First blank is for the value. Second blank is for the units. Third blank is for the direction.
Net Force = [blank_start]17[blank_end] [blank_start]N[blank_end] [blank_start]Right[blank_end]
Image:
Fbd (binary/octet-stream)
Respuesta
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17
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N
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Right
Pregunta 8
Pregunta
What is the net force on a object with the following forces acting upon it:
First blank is the resultant value. Second blank is the units. Third blank is the angle from the + x axis.
+x = 10 N
- x = 13 N
+y = 0 N
- y = 4 N
R = [blank_start]5[blank_end] [blank_start]N[blank_end] @ [blank_start]240[blank_end] degrees
Respuesta
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5
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N
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240
Pregunta 9
Pregunta
[blank_start]Gravity[blank_end] is the force between all masses.
[blank_start]Friction[blank_end] is the force that resists all motion.
[blank_start]Normal[blank_end] is the force that resists an object being pulled into another object. It is always 90 degrees to its surface.
Respuesta
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Gravity
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Friction
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Normal
Pregunta 10
Pregunta
A 10 kg box is moving on a rough surface with a speed of 1 m/s. It comes to rest in 2 seconds. What is the force of friction acting on the box?
Respuesta
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0.5 N
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5 N
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50 N
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500 N
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