Physical Quantities And Measurement Techniques
A student uses the displacement method to determine the volume of a small stone. The initial water level in the measuring cylinder is 34.0 cm³ and the final water level is 41.5 cm³. What is the volume of the stone?
A student reads the volume of water in a measuring cylinder by looking downward at an angle from above. Which statement correctly describes the effect on the reading?
A student uses a stopwatch to time a ball falling through a distance that takes approximately 0.5 s. State one reason why this measurement has a large percentage uncertainty.
A student measures the time for 25 complete oscillations of a pendulum as 30.0 s. Calculate the period of one oscillation.
Explain why a fiducial marker is placed at the equilibrium (centre) position of a pendulum rather than at the extreme of its swing. Which statement gives the correct reason?
A student measures the thickness of 80 identical sheets of card as 24.0 mm using a ruler. Calculate the thickness of one sheet of card.
Which row correctly classifies all three quantities?
A car travels at a constant speed of 20 m s⁻¹ around a circular roundabout. Which statement about the car’s motion is correct?
A helicopter exerts a vertical lift force of 12 000 N upward while a horizontal wind pushes it with a force of 5 000 N to the east. Calculate the magnitude of the resultant force on the helicopter.
Two forces act on a particle at right angles: F₁ = 7.0 N east and F₂ = 24.0 N north. Determine the direction of the resultant force, measured as an angle from the eastward direction.
A swimmer crosses a river heading due north at 1.2 m s⁻¹ relative to the water. The river current flows due east at 0.9 m s⁻¹. What is the magnitude of the swimmer’s resultant velocity?
An engineer needs to determine the volume of a small, irregularly shaped metal component that sinks in water. The component is too small to measure with a ruler. Which method is most appropriate?
Which pair of quantities consists of one scalar and one vector?
A student wants to find an accurate value for the period of a pendulum. She times 20 oscillations three times, obtaining 16.2 s, 16.6 s, and 16.4 s. What is the best estimate for the period of one oscillation?
A force of 10.0 N acts due north on an object, and simultaneously a force of 10.0 N acts due east. Which value is closest to the magnitude of the resultant force?
During an experiment, a student notices that the pendulum bob appears to pass the fiducial marker at slightly different positions each swing. State one improvement the student could make to reduce this inconsistency.