Q: A student measures the mass of a sample as $$0.0250\ \mathrm{kg}$$ and its volume as $$10.0\ \mathrm{cm^3$}. $$What is the density in $$\mathrm{kg/m^3$}$$, using correct significant figures?

$$2.50 \times 10^3$\ \mathrm{kg/m^3$}$$

Question 1

A car travels 60 km east in 1.5 hours. What is the car's average velocity in m/s?

Accepted Answer

$$11.1\ \mathrm{m/s}$$

Question 2

Which of the following best describes the difference between speed and velocity?

Accepted Answer

Velocity includes direction, while speed does not.

Question 3

A ball is thrown vertically upward with an initial velocity of $$20\ \mathrm{m/s}. $$Neglecting air resistance, what is its velocity after $$2\ \mathrm{s}$$? (Take $$g = 9.8\ \mathrm{m/s^2$}$$ downward.)

Accepted Answer

$$0.4\ \mathrm{m/s}$$\ downward

Question 4

Which of the following is the correct formula for acceleration?

Accepted Answer

$$a = \frac{v_f - v_i}{t}$$

Question 5

A projectile is launched at an angle of $$30^\circ$$ above the horizontal with a speed of $$40\ \mathrm{m/s}. $$What is the initial vertical component of its velocity?

Accepted Answer

$$20\ \mathrm{m/s}$$

Question 6

Which of the following statements about Newton's First Law is correct?

Accepted Answer

An object at rest will remain at rest unless acted upon by a net external force.

Question 7

A student measures the mass of a sample as $$0.0250\ \mathrm{kg}$$ and its volume as $$10.0\ \mathrm{cm^3$}. $$What is the density in $$\mathrm{kg/m^3$}$$, using correct significant figures?

Accepted Answer

$$2.50 	imes 10^3$\ \mathrm{kg/m^3$}$$

Question 8

Which of the following is the correct conversion of $$5.0\ \mathrm{km} to $$meters, using significant figures?

Accepted Answer

$$5000\ \mathrm{m}$$

Question 9

A runner accelerates from rest at $$2.0\ \mathrm{m/s^2$}$$ for $$5.0\ \mathrm{s}. $$What is the runner's final velocity?

Accepted Answer

$$10.0\ \mathrm{m/s}$$

Question 10

Which of the following is the correct way to write $$0.00045 in $$scientific notation?

Accepted Answer

$$4.5 	imes 10$$^{-4}$$

Question 11

A stone is dropped from a cliff and hits the ground after $$3.0\ \mathrm{s}. $$What is the height of the cliff? (Neglect air resistance, $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$44.1\ \mathrm{m}$$

Question 12

Which of the following is NOT a vector quantity?

Accepted Answer

Speed

Question 13

A projectile is launched horizontally from a $$20\ \mathrm{m}$$ high cliff with a speed of $$15\ \mathrm{m/s}. $$How far from the base of the cliff does it land? (Neglect air resistance, $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$30.3\ \mathrm{m}$$

Question 14

Which of the following best describes the relationship between force and acceleration according to Newton's Second Law?

Accepted Answer

Force is directly proportional to acceleration.

Question 15

A $$5.0\ \mathrm{kg}$$ object is acted on by a net force of $$20\ \mathrm{N}. $$What is its acceleration?

Accepted Answer

$$4.0\ \mathrm{m/s^2$}$$

Question 16

Which of the following is the correct formula for weight?

Accepted Answer

$$W = m 	imes g$$

Question 17

A car moves with a constant velocity of $$25\ \mathrm{m/s}$$ for $$10\ \mathrm{s}$$, then accelerates at $$2\ \mathrm{m/s^2$}$$ for $$5\ \mathrm{s}. $$What is the total distance traveled?

Accepted Answer

$$325\ \mathrm{m}$$

Question 18

Which of the following is the correct way to subtract vectors graphically?

Accepted Answer

Reverse the direction of the vector to be subtracted and add it to the first vector.

Question 19

A cyclist travels $$12\ \mathrm{km}$$ north, then $$5\ \mathrm{km}$$ east. What is the magnitude of the displacement?

Accepted Answer

$$13\ \mathrm{km}$$

Question 20

Which of the following is the correct relationship between acceleration and force?

Accepted Answer

$$a = \frac{F}{m}$$

Physics Exam 1 Study Guide: Fundamental Concepts and Problem-Solving Skills

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