XI Physics Test 1 (KSA)

What is the vector product of two vectors?

• The vector product results in a scalar quantity.

• The vector product of two vectors is always zero.

• The vector product of two vectors results in a vector that is perpendicular to both original vectors.

• The vector product is the same as the dot product.

Define the scalar product of two vectors.

• The scalar product of two vectors is the sum of the products of their corresponding components.

• The scalar product is the average of the vectors' components.

• The scalar product is the product of the vectors' magnitudes.

• The scalar product is the difference of the vectors' magnitudes.

How do you resolve a vector into its components?

• The components of a vector are found by adding the angles together.

• The components of a vector can be resolved using: x = magnitude * cos(angle), y = magnitude * sin(angle).

• The components are determined by dividing the magnitude by the angle.

• You can resolve a vector by multiplying the magnitude by the angle directly.

What is the difference between accuracy and precision?

• Accuracy is the degree of closeness to a target; precision is the range of values.

• Accuracy measures the average; precision measures the total.

• Accuracy is about the number of attempts; precision is about the time taken.

• Accuracy is about correctness; precision is about consistency.

Explain the concept of uncertainty in measurements.

• Uncertainty refers to the total number of measurements taken.

• Uncertainty in measurements is the exact value of a measurement.

• Uncertainty is the confidence level of a measurement without any error margin.

• Uncertainty in measurements is the doubt about the accuracy of a measurement, expressed as a range or margin of error.

What is the equation of motion for an object under constant acceleration?

• s = ut + 0.5at²

• s = ut + at

• s = ut² + 0.5a

• s = 0.5at

How do you calculate the magnitude of a vector?

• Magnitude = x^2 + y^2 - z^2

• Magnitude = |x| + |y| + |z|

• Magnitude = x + y + z

• Magnitude = √(x^2 + y^2 + z^2)

What is the significance of the dot product in physics?

• The dot product measures the cosine of the angle between two vectors, indicating their directional alignment and is crucial for calculating work and projections.

• The dot product measures the distance between two points.

• The dot product determines the speed of an object.

• The dot product is used to calculate the area of a triangle.

Describe how to find the resultant of two vectors using the parallelogram law.

• The resultant vector is represented by the diagonal of the parallelogram formed by the two vectors.

• The resultant vector is represented by the area of the parallelogram formed by the two vectors.

• The resultant vector is found by subtracting the two vectors.

• The resultant vector is the sum of the magnitudes of the two vectors.

What are the units of measurement for velocity?

• meters per minute (m/min)

• feet per second (ft/s)

• miles per hour (mph)

• meters per second (m/s), kilometers per hour (km/h)