Question 1

Which of the following best describes the difference between a scalar and a vector quantity in physics?

Accepted Answer

A scalar has only magnitude, while a vector has both magnitude and direction.

Question 2

A car accelerates from rest at a constant rate of $$2.0\ \mathrm{m/s^2$}$$ for $$5.0\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

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

Question 3

Which of the following is the correct expression for Newton's Second Law of Motion?

Accepted Answer

$$F = m \cdot a$$

Question 4

A $$5.0\ \mathrm{kg}$$ box is at rest on a horizontal surface. The coefficient of static friction between the box and the surface is $$0.4. $$What is the maximum force that can be applied horizontally before the box starts to move?

Accepted Answer

$$19.6\ \mathrm{N}$$

Question 5

Which of the following best describes the principle of conservation of momentum in a collision?

Accepted Answer

The total momentum of the system before the collision is equal to the total momentum after the collision.

Question 6

A $$2.0\ \mathrm{kg}$$ object moving at $$3.0\ \mathrm{m/s}$$ collides with a stationary $$1.0\ \mathrm{kg}$$ object. If the collision is perfectly inelastic, what is the final velocity of the combined mass?

Accepted Answer

$$2.0\ \mathrm{m/s}$$

Question 7

Which equation correctly relates work ($$W$$), force ($$F$$), and displacement ($$d) $$when the force is applied in the direction of displacement?

Accepted Answer

$$W = F \cdot d$$

Question 8

A $$0.5\ \mathrm{kg}$$ ball is dropped from a height of $$10\ \mathrm{m}. $$Ignoring air resistance, what is its velocity just before hitting the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$14.0\ \mathrm{m/s}$$

Question 9

Which of the following statements about electric circuits is correct?

Accepted Answer

In a series circuit, the current is the same through all components.

Question 10

A ray of light passes from air ($$n=1.0) $$into water ($$n=1.33) at an $$angle of $$30^	ext{o} to $$the normal. What is the angle of refraction in the water?

Accepted Answer

$$22^	ext{o}$$

Question 11

Which of the following is the correct formula for the centripetal force acting on an object of mass $$m$$ moving in a circle of radius $$r at $$speed $$v$$?

Accepted Answer

$$F_c = \frac{mv^2$}{r}$$

Question 12

A $$10\ \mathrm{kg}$$ object is lifted vertically by $$2.0\ \mathrm{m}. $$How much work is done against gravity? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$196\ \mathrm{J}$$

Question 13

Which of the following best describes the role of a normal force in equilibrium?

Accepted Answer

It balances the component of force perpendicular to the surface.

Question 14

A $$3.0\ \mathrm{kg}$$ object moving at $$4.0\ \mathrm{m/s}$$ collides elastically with a $$2.0\ \mathrm{kg}$$ object at rest. What is the velocity of the $$3.0\ \mathrm{kg}$$ object after the collision?

Accepted Answer

$$0.8\ \mathrm{m/s}$$

Question 15

Which of the following is a correct statement about the relationship between electric current ($$I$$), voltage ($$V$$), and resistance ($$R) in a $$circuit?

Accepted Answer

$$I = \frac{V}{R}$$

Question 16

A student measures the time for a pendulum to complete 10 oscillations and records $$20.0\ \mathrm{s}. $$What is the period of the pendulum?

Accepted Answer

$$2.0\ \mathrm{s}$$

Question 17

Which of the following is the correct formula for kinetic energy ($$KE) of an $$object of mass $$m$$ moving at velocity $$v$$?

Accepted Answer

$$KE = \frac{1}{2}mv^2$

Question 18

A $$1.0\ \mathrm{kg}$$ block slides down a frictionless incline of height $$5.0\ \mathrm{m}. $$What is its speed at the bottom? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$9.9\ \mathrm{m/s}$$

Question 19

Which of the following best describes the function of a laboratory experiment in physics education?

Accepted Answer

To measure and record data, analyze results, and assess recorded data.

Principles of Physics (PHYS 104) – Course Syllabus and Study Guide

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