Physics Quiz on Vectors and Motion

What is the CGS unit of length?

• meter

• centimeter

• foot

• inch

Accuracy is best described as:

• The repeatability of measurements.

• The ability to measure with small deviations.

• The closeness of measurements to the true value.

• None of the above.

Systematic errors can be reduced by: (click two answers)

• Taking more measurements and averaging them.

• Using more precise instruments.

• Calibrating instruments before use.

Two forces, F₁ = 6 N directed west and F₂ = 8 N directed south, act on an object. What is the magnitude of the resultant vector?

• 2 N

• 10 N

• 14 N

• 48 N

1.     What method is used when two vectors form an angle between 0⁰ and 180⁰ ?

• Component method

• Head-to-tail method

• Parallelogram method

• Polygon method

What are the components of a vector with magnitude 15 units at an angle of 45° south of west?

• -15 cos(45°) and -15 sin(45°)

• 15 sin(45°) and 15 cos(45°)

• 15 cos(30°) and 15 sin(30°)

• 15 cos(60°) and 15 sin(60°)

Two vectors, C and D, have magnitudes of 6 units and 8 units, respectively. Vector C points west, and vector D points south. What can be said about the magnitude and direction of their resultant vector?

• The magnitude is 10 units, and the direction is southwest.

• The magnitude is less than 8 units, and the direction is southeast.

• The magnitude is greater than 8 units, and the direction is southwest.

• The magnitude is 14 units, and the direction is northwest.

A motorcycle accelerates uniformly from rest to a speed of 30 m/s in 6 seconds. What is the motorcycle's acceleration?

• 3 m/s²

• 4 m/s²

• 5 m/s²

• 6 m/s²

Which statement best describes the difference between constant speed and constant acceleration?

• Both constant speed and constant acceleration involve a change in direction over time.

• Both constant speed and constant acceleration involve a change in speed over time.

• In constant speed, the object's speed remains the same, while in constant acceleration, the object's velocity changes.

• In constant speed, the object's acceleration is zero, while in constant acceleration, the object's speed increases.

What indicates the area in an acceleration-time graph?

• change in time of the object

• change in speed of the object

• change in velocity of the object

• change in distance of the object