MTH301 Quizs 4 Solved before mid Fall 2012 Rescheduled

Question

If two dogs are pulling a bone with force=20Newtons in opposite direction, then the resultant force is———
Select correct option:

1. 40 Newton
2. -40 Newton
3. -20 Newton
4. Zero Newton 

Question

Magnitude of the Force vector: F = -30Newton, is ————.
Select correct option:

1. 30 Newton 
2. -30 Newton

Question

Cross product of equal and opposite non-zero vectors (parallel or anti-parallel) is a——.
Select correct option:

1. Zero vector 
2. Zero scalar

Question

A zero vector has magnitude equal to zero and makes an angle of ———- degree with x-axis.
Select correct option:

1. Arbitrary
2. Only zero 
3. 90
4. 180

Question

The surface:z=f(x,y) neither falls nor rises(decreases or increases) at any point in the ——of Gradient(z).
Select correct option:

1. Direction 
2. Opposite to the direction
3. Direction perpendicular to
4. Arbitrary direction

Question

Length or magnitude of a unit vector is——–.
Select correct option:

1. 0
2. 1 Correct

Question

Scalar Triple Product of vectors A=[1,0,0], B=[0,1,0] and C=[0,0,1] is———
Select correct option:

1. 3 Correct
2. -1
3. 1
4. 0

Question

If the velocity (V1) of a car is 20m/s eastward and velocity (V2) of bike is 40m/s northward then which of the following would be the dot product of these velocities?
Select correct option:

1. 800
2. Zero
3. -800 
4. 2

Question

Value of money is an example of ——– quantity
Select correct option:

1. Scalar
2. Vector

Question

Two vectors of magnitudes [4,5] making an angle of 30degree, then the area of parallelogram associated with these two vectors is ——— square units.
Select correct option:

1. 10*Sqrt(3)
2. 10
3. 20*Sqrt(2) not sure
4. 10*Sqrt(2)