Checking the concept of “force impulse”
Evaluate the statement: The product of the average force and the time of action is equal to the change in the momentum of the body.
9TH GRADE
Grade 9 Physics Problems
Topic-based Grade 9 physics problem sets with questions, answer choices, and links to the relevant theory.
63 problems7 main topics
KinematicsCoordinates, vectors, graphs, acceleration and circular motion.9 problems→Newton's lawsInertial systems, forces, gravity, weight and friction.6 problems→Curvilinear movement and balanceCentripetal force, satellites and stability of bodies.6 problems→Mechanical vibrationsPendulums, harmonic, free and forced vibrations.6 problems→Mechanical waves and soundTypes of waves, length, speed, properties and perception of sound.6 problems→Light phenomenaGeometric and wave optics, lenses, color and spectra.12 problems→Nuclear physicsCommunication energy, reactions, energy and radiation protection.6 problems→
ADDITIONAL
Problems to review
Checking the concept of “Conservation of Momentum”
Evaluate the statement: the concept of “Conservation of momentum” means: A vector quantity equal to the product of the mass of a body and its speed.
Inelastic collision between carts
A cart with a mass of 2 kg moves at a speed of 3 m/s and is coupled to a cart with a mass of 1 kg at rest. Find the overall speed.
Checking the concept of “Mechanical energy”
Evaluate the statement: The sum of kinetic and potential energy describes the ability of a system to do mechanical work.
Checking the concept of “Force work”
Evaluate the statement: the concept “Work of force” means: Under the action of only conservative forces, the sum of kinetic and potential energies remains constant.
Kinetic energy of the ball
A ball of mass 2 kg moves at a speed of 6 m/s. Find its kinetic energy.
Checking the concept of “Electromagnetic wave”
Evaluate the statement: A propagating, interconnected change in electric and magnetic fields that does not require a material medium.
Checking the concept of “Electromagnetic wave ranges”
Evaluate the statement: Electromagnetic Wave Ranges means: Risk depends on the frequency, intensity, exposure time, and ability of the radiation to ionize a substance.
Range selection
What range is used for medical imaging of bones while requiring strict dose control?
Checking the concept “Composition of the atomic nucleus”
Evaluate the statement: The nucleus is made up of protons and neutrons, collectively called nucleons, held together by nuclear forces.
Checking the concept of “Atomic Models and Spectra”
Evaluate the statement: The concept of Atomic Models and Spectra means: Unstable nuclei spontaneously transform, emitting alpha, beta particles or gamma quanta.
Composition of aluminum atom
A neutral atom has a charge number of 13 and a mass number of 27. How many protons, electrons and neutrons does it have?