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EnglandPhysics

Mechanics and materials

5 dot points across 5 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do forces determine how objects move?

Scalars and vectors, resolving and combining forces, free-body diagrams, Newton's three laws of motion, weight, friction and the conditions for equilibrium and moments.
A focused answer to the Edexcel 9PH0 forces content, covering scalars and vectors, resolving and combining forces, free-body diagrams, Newton's three laws, weight, friction, and the conditions for equilibrium and moments.
11 min answer →

How do solids deform and how do objects move through fluids?

Hooke's law and the spring constant, stress, strain and the Young modulus, elastic strain energy, density and upthrust, and viscous drag with Stokes' law and terminal velocity.
A focused answer to the Edexcel 9PH0 materials and fluids content, covering Hooke's law, stress, strain and the Young modulus, elastic strain energy, density and upthrust, and viscous drag through Stokes' law and terminal velocity.
12 min answer →

What is conserved when objects collide?

Linear momentum as the product of mass and velocity, conservation of momentum in collisions and explosions, impulse as the change in momentum, and elastic versus inelastic collisions.
A focused answer to the Edexcel 9PH0 momentum content, covering linear momentum, the conservation of momentum in collisions and explosions, impulse as the change in momentum, and the distinction between elastic and inelastic collisions.
11 min answer →

How do we describe and predict the motion of an object?

Displacement, velocity and acceleration; motion graphs; the equations of uniformly accelerated motion (suvat); projectile motion as independent horizontal and vertical components.
A focused answer to the Edexcel 9PH0 kinematics content, covering displacement, velocity and acceleration, motion graphs, the suvat equations of uniformly accelerated motion, and projectile motion as independent horizontal and vertical components.
11 min answer →

How is energy transferred when forces do work?

Work done by a force, kinetic and gravitational potential energy, the principle of conservation of energy, power as the rate of doing work, and efficiency.
A focused answer to the Edexcel 9PH0 work and energy content, covering work done by a force, kinetic and gravitational potential energy, conservation of energy, power as the rate of doing work, and efficiency.
10 min answer →