Physics Olympiad Practice Quiz

What is the approximate mass of a typical car?

• 100 kg

• 100,000 kg

• 1000 kg

• 10,000 kg

If Planck's constant is measured in centimeter-gram-second units, by what factor does its numerical value increase?

• 10^7

• 10^5

• 10^3

• 10^9

What is the base unit for speed in the kinetic energy formula?

• m/s

• m^2/s^2

• kg m^2/s^2

• kg m/s^2

What is the unit of Planck's constant in the SI system?

• Joule

• Joule-second

• Newton

• Watt

Which of the following is a correct dimensional analysis for the mass of a boulder in a riverbed?

• Density * v^6 / g^3

• Density * v^4 / g^2

• Density * v^2 / g^3

• Density * v^3 / g^2

What is the dimensional formula for gravitational acceleration?

• m/s^2

• kg m^2/s^2

• m/s

• kg m/s^2

How many molecules are approximately in a teaspoon of sugar?

• 10^20

• 10^21

• 10^23

• 10^22

What is Avogadro's number approximately equal to?

• 6.0 x 10^23

• 6.0 x 10^24

• 6.0 x 10^25

• 6.0 x 10^22

Why might a plate land upside down when knocked off a table?

• Air drag on the plate

• The weight of the food on top

• A spinning motion from the push

• A turning force by gravity as it slides off

Which factor does not contribute to a plate turning over when falling?

• Horizontal push

• Gravity at the edge

• Weight of the food

• Air drag