General Physics 1 (Pre-Test)

Which is a correct expression of scientific notation?

• 7.2 x 10 m

• 0.5 x10^-2 m

• 1.5 x 10^-5 m

• 100^6m

Answer explanation

Scientific notation is a way of writing very large or very small numbers. A number is written in scientific notation when a number between 1 and 10 is multiplied by a power of 10.

If a book weighs 5000 grams, how many kilograms does it weigh?

• 0.5 kg

• 5kg

• 50 kg

• 500 kg

Which of the following best describes measured values with respect to the exact value?

exact value: 13.3 mol/kg      measured values: 11.2 mol/kg, 8.90 mol/kg, 5 mol/kg

• precise

• accurate

• both precise and accurate

• Neither precise nor accurate

Which of the following data is NOT a vector quantity?

• 5 km, west

• 15 m, north

• 35 m

• 20 km, south

Consider two vectors both directed to the east and with a magnitude of 10 m. What will be the resultant vector when they are added?

• 10 m, east

• 0

• 20 m, east

• 5 m, east

A vector is directed towards the north with a very large magnitude. How will you describe the x-component?

• very large

• average

• equal to its y-component

• zero

From a toll gate, a car accelerates to a velocity of 60 km/hr in 10 minutes. What is the acceleration of the vehicle?

• 360 km/hr^2

• 240 km/hr^2

• 120 km/hr^2

• 60 km/hr^2

A toy has been dropped off by a kid on the 19th floor of his family’s condominium unit. The unit is 40 m high. Disregarding air resistance, how long will the toy reach the ground?

• 5.00 s

• 4.00 s

• 2.85 s

• 2.35s

Leonard wanted to measure the depth of the dried-up well beside their house. He dropped a coin into it, and it took 2.00 seconds for the coin to reach the ground. What is the total depth of the well?

• 19. 6 m

•  29.6 m

• 9.62 m

• 91.6 m

A ball is thrown in the air at an angle of 40.00. If the maximum height reaches 10.00 m, what must be its initial speed?

• 17. 46 m/s

• 21.78 m/s

• 304.9 m/s

• 474.4 m/s