Question 1

Which of the following is the correct SI unit and dimension for acceleration?

Accepted Answer

Meter per second squared $$[L]/[T^2$]$$

Question 2

A measurement is recorded as $$0.00450 kg. $$How many significant figures does this value have?

Accepted Answer

3

Question 3

Which prefix corresponds to $$10^{-9}$$?

Accepted Answer

nano

Question 4

A car travels $$120 km in$$ $$2.0$$ hours. What is its average speed in m/s? (1 km = 1000 m, 1 hour = 3600 s)

Accepted Answer

$$16.7 m/s$$

Question 5

Which of the following equations is NOT dimensionally consistent?

Accepted Answer

$$E = m v^2$

Question 6

Convert $$2.5$$ meters to centimeters.

Accepted Answer

$$250 cm$$

Question 7

A student measures the mass of an object as $$3.20 kg $$and its volume as $$0.400 m$^3. $$What is the density in g/cm$$^3$$? ($$1 kg$$ = $$1000 g$$, $$1 m$^3$$ = $$10^6 cm$^3)$$

Accepted Answer

$$0.00800$$ $$g/cm^3$

Question 8

Which of the following quantities is a vector?

Accepted Answer

Velocity

Question 9

If a car moves to the left at $$30 m/s$$, what is its velocity if right is defined as positive?

Accepted Answer

$$-30 m/s$$

Question 10

A measurement is given as $$5.60 	imes 10^3$ m. How many significant figures does this value have?

Accepted Answer

3

Question 11

Which of the following is the correct dimension for energy?

Accepted Answer

$$[M][L^2$]/[T^2$]$$

Question 12

A runner completes a $$400 m $$lap in $$50.0 s. $$What is the average speed in km/h? ($$1 km$$ = $$1000 m$$, $$1 h$$ = $$3600 s)$$

Accepted Answer

$$28.8 km/h$$

Question 13

Which of the following is an example of a scalar quantity?

Accepted Answer

Distance

Question 14

What is the order of magnitude estimate for the number of seconds in a year?

Accepted Answer

$$10^7$$

Question 15

A measurement is $$15.0 \pm 0.3 cm. $$What is the percentage uncertainty?

Accepted Answer

$$2.0\%$$

Question 16

Which of the following is the correct conversion for $$1$$ microsecond to seconds?

Accepted Answer

$$1 	imes 10$$^{-6}$$ s

Question 17

If $$x = v_0$ t + \frac{1}{2} a t^2$, what are the dimensions of a$?

Accepted Answer

$$[L]/[T^2$]$$

Question 18

Which of the following is the correct scientific notation for $$0.000560 m $$with the correct number of significant figures?

Accepted Answer

$$5.60 	imes 10$$^{-4}$$ m$

Question 19

A box has a length of $$2.00 m$$, width $$0.500 m$$, and height $$0.300 m. $$What is its volume in cm$$^3$$?

Accepted Answer

$$3.00 	imes 10^4$ cm^3$

Introduction to Physics: Fundamental Concepts, Measurement, and Problem Solving

Study Guide - Practice Questions

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