Practice Test_P

A car travels 60 km east and then 40 km west. What is the car's displacement?

• 60 km west
• 40 km east
• 100 km east
• 20 km east

Answer explanation

Displacement measures the shortest straight-line distance between the starting and ending points, including direction. Here, the car moves 60 km east and 40 km west, so the net displacement is 60−40=20 km east60 - 40 = 20 \, \text{km east}60−40=20km east.

True or False: The magnitude of displacement can never be greater than the total distance traveled.

• True

• False

Answer explanation

Displacement is a vector quantity and represents the shortest path. Distance is a scalar quantity and includes the total path traveled. Hence, displacement cannot exceed the distance.

A cyclist maintains a constant speed of 12 m/s for 10 seconds. What is the total distance covered?

A car accelerates uniformly from rest to 20 m/s in 5 seconds. What is its acceleration?

Which device measures instantaneous speed or velocity in a vehicle?

True or False: Negative acceleration always means the object is slowing down.

• True

• False

Which of the following correctly represents the relationship between wave velocity, frequency, and wavelength?

• v = λ / f
• f = v + λ
• λ = v - f
• v = f × λ

A wave has a frequency of 5 Hz and a wavelength of 2 m. What is its velocity?

True or False: The amplitude of a wave determines its energy.

• True

• False

What property of a sound wave primarily determines its pitch?

• Amplitude
• Frequency
• Wavelength
• Speed