USP_Time, Scalar and Vector Qty

What is a time interval?

• The time taken for ONE complete oscillation

• The distance moved per unit time

• The rate of change of displacement

• The time taken from the beginning to the end of an event

What instrument is used to measure time interval?

• Electronic stopwatch

• Compass

• Thermometer

• Ruler

What is the precision of an electronic stopwatch: ____ s

How is the reading of an electronic stopwatch recorded?

• To the nearest whole number

• To the nearest three decimal places

• To the nearest two decimal places

• To the nearest ten seconds

What is the period of a pendulum?

• The rate of change of displacement

• The distance moved per unit time

• The time taken for ONE complete oscillation

• The time taken from the beginning to the end of an event

What factors affect the period of a pendulum?

• Mass of the bob and human reaction time

• Length and mass of the bob

• Length and gravitational field strength

• Mass of the bob and gravitational field strength

How will the mass of the bob affect the period of a pendulum?

• It increases the period

• It decreases the period

• It has no effect on the period

• It makes the period random

What is human reaction time?

• A systematic error

• A random error

• A constant error

• A variable error

What are scalar quantities?

• Physical quantities with only magnitude

• Physical quantities with both magnitude and direction

• Physical quantities with no magnitude or direction

• Physical quantities with only direction

What are vector quantities?

• Physical quantities with both magnitude and direction

• Physical quantities with only magnitude

• Physical quantities with only direction

• Physical quantities with no magnitude or direction