12. AS Edexcel Specification Check

Which equation represents the displacement (s) for uniformly accelerated motion in one dimension?

• s = (u + v)t

• s = ut + 1/2 at^2

• s = vt - 1/2 at^2

• s = (u + v)t / 2

What is required to resolve a vector into two components?

• The vector must be at an angle to the horizontal.

• The components must be perpendicular to each other.

• The components must be parallel to each other.

• The vector must be horizontal.

Which graph is essential for understanding the motion of a projectile moving freely under gravity?

• Displacement-time graph

• Velocity-time graph

• Acceleration-time graph

• Force-time graph

What type of diagrams are used to represent forces on a particle or on an extended but rigid body?

• Free-body diagrams

• Vector diagrams

• Scalar diagrams

• Motion diagrams

What is the equation for Newton's second law of motion where mass (m) is constant?

• F = ma

• F = m/a

• F = a/m

• F = m+a

What does the principle of conservation of momentum state?

• Momentum is conserved when no external forces act.

• Momentum increases with time.

• Momentum is not conserved.

• Momentum equals force times distance.

What is the definition of electric current as mentioned in the learning material?

• The rate of energy transfer

• The rate of flow of charged particles

• The resistance of the circuit

• The potential difference across components

Which equation is used to calculate the voltage in an electric circuit?

• I = ΔQ/Δt

• V = W/Q

• R = V/I

• P = VI

What does Ohm's law state as a special case?

• V = IR when I ∝ V for constant temperature

• I = V/R when V ∝ I for constant temperature

• R = V/I when I ∝ V for constant temperature

• V = I/R when I ∝ V for constant temperature

How is resistance calculated using the physical properties of a material?

• R = ρl/A

• R = l/ρA

• R = A/ρl

• R = ρA/l