Question 1

A car accelerates uniformly from rest to a velocity of $$20\ \mathrm{m/s} in$$ $$10\ \mathrm{s}. $$What is the magnitude of its acceleration?

Accepted Answer

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

Question 2

Which of the following best describes Newton's Third Law of Motion?

Accepted Answer

For every action, there is an equal and opposite reaction.

Question 3

A $$5\ \mathrm{kg}$$ block is pulled across a horizontal surface with a force of $$30\ \mathrm{N}. If $$the coefficient of kinetic friction is $$0.2$$, what is the acceleration of the block? (Take $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$3.08\ \mathrm{m/s^2$}$$

Question 4

Which of the following statements about energy conservation in a closed system is correct?

Accepted Answer

The total energy remains constant, but it can change forms.

Question 5

A ball is dropped from a height of $$45\ \mathrm{m}. $$Ignoring air resistance, how long does it take to reach the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$3.03\ \mathrm{s}$$

Question 6

Which of the following best explains why astronauts in the International Space Station appear weightless?

Accepted Answer

They are in continuous free fall around the Earth.

Question 7

A $$2\ \mathrm{kg}$$ object moves in a circle of radius $$0.5\ \mathrm{m} at a $$constant speed of $$4\ \mathrm{m/s}. $$What is the magnitude of the centripetal force acting on the object?

Accepted Answer

$$16\ \mathrm{N}$$

Question 8

Which of the following is a correct statement about electric current in a simple circuit?

Accepted Answer

Current is the rate of flow of electric charge, measured in amperes.

Question 9

A $$10\ \Omega$$ resistor and a $$20\ \Omega$$ resistor are connected in series to a $$30\ \mathrm{V}$$ battery. What is the current through the circuit?

Accepted Answer

$$1.0\ \mathrm{A}$$

Question 10

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

Accepted Answer

$$F = ma$$

Question 11

A $$0.5\ \mathrm{kg}$$ mass attached to a spring oscillates with a period of $$2\ \mathrm{s}. $$What is the spring constant $$k$$?

Accepted Answer

$$4.93\ \mathrm{N/m}$$

Question 12

Which of the following is true about the reflection of light from a plane mirror?

Accepted Answer

The angle of incidence equals the angle of reflection.

Question 13

A $$12\ \mathrm{V}$$ battery is connected to a parallel circuit with two resistors: $$6\ \Omega$$ and $$12\ \Omega. $$What is the total current supplied by the battery?

Accepted Answer

$$3\ \mathrm{A}$$

Question 14

Which of the following best describes the energy transformation in a hydroelectric power plant?

Accepted Answer

Gravitational potential energy to kinetic energy to electrical energy

Question 15

A $$0.2\ \mathrm{kg}$$ ball is thrown vertically upward with an initial velocity of $$10\ \mathrm{m/s}. $$What is the maximum height it reaches? (Ignore air resistance, $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$5.1\ \mathrm{m}$$

Question 16

Which of the following is a correct statement about Coulomb's Law?

Accepted Answer

The force between two point charges is proportional to the product of their charges and inversely proportional to the square of the distance between them.

Question 17

A $$1.5\ \mathrm{kg}$$ object moving at $$4\ \mathrm{m/s}$$ collides with a stationary $$2.5\ \mathrm{kg}$$ object. If they stick together after the collision, what is their final velocity?

Accepted Answer

$$1.5\ \mathrm{m/s}$$

Question 18

Which of the following best describes the function of a capacitor in an electric circuit?

Accepted Answer

It stores electrical energy in an electric field.

Question 19

A sound wave travels at $$340\ \mathrm{m/s}. If $$its frequency is $$1700\ \mathrm{Hz}$$, what is its wavelength?

Accepted Answer

$$0.2\ \mathrm{m}$$

Question 20

Which of the following is true about the relationship between electric potential difference (voltage), current, and resistance in a circuit?

Accepted Answer

$$V = IR$$

Physics Study Notes: Scientific Method, Motion, Forces, Energy, Waves, and Electricity

Guida di studio - Domande di pratica

Study guide - Flashcard