This online test explores key concepts in physics, focusing on scalar and vector quantities. It assesses understanding through problems involving dot products, cross products, and real-world applications like work done, ensuring a comprehensive evaluation of vector manipulation and its physical implications.
A) speed has no units
B) speed shows only magnitude, while velocity represents both magnitude (strength) and direction
C) they use different units to represent their magnitude
D) velocity has a higher magnitude
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a) always has mass
B) is a quantity that is completely specified by its magnitude
C) shows direction
D) does not have units
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A) Mass
B) Force
C) Density
D) Speed
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A) Fixed vector
B) Zero vector
C) Modulus of a vector
D) Unit vector
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A) Velocity
B) Acceleration
C) Volume
D) Force
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3
5
-2
0.4
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True
False
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A) It has no magnitude
B) Zero
C) Constant but not zero
D) Unity
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A) velocity can be negative
B) velocity is a vector
C) speed is a scalar
D) speed can be negative
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A) Cross product
B) Dot product
C) Addition of two vectors
D) Cannot be calculated
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A) -50 pounds
B) 100 pounds
C) 0 pounds
D) -75 pounds
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A) 32 N toward north
B) 20 N towards north
C) 32 N towards south
D) 8 N towards north
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A) Parallel
B) Collinearly parallel
C) Not parallel
D) Data insufficient
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A) Resolution of forces
B) Addition of vectors
C) Subtraction of vectors
D) Multiplication of vectors
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A) Negative
B) Positive
C) Constant
D) Zero
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A) 15N and 35N
B) 15N and 25N
C) 10N and 15N
D) 20N and 5N
A) 3i – 11j + 7k
B) -3i + 11j + 7k
C) -3i – 11j – 7k
D) -3i + 11j – 7k
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A) 1 mile SW
B) 7 miles NE
C) 5 miles NE
D) 5 miles E
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A) 60°
B) 120°
C) 90°
D) 100°
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A) 400J
B) 1960J
C) 250J
D) 2514J
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A)Number
B)Number according to direction
C)Number according to unit
D)B and C both
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A) A . (B . C) = scalar value
b) A . (B x C) = scalar value
C) A x (B . C) = scalar value
D) A x (B x C) = vector value
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A) 50J
B) 150J
C) 100J
D) 200J
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A) Is always positive
B) Can never be zero
C) Can never be negative
D) Is usually zero
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