Year 12 Physics Retrieval Quiz

A car accelerates from 10 m/s to 30 m/s in 5 seconds. What is its acceleration? Use: a = (v - u) / t

• 4 m/s^2

• 5 m/s^2

• 6 m/s^2

• 8 m/s^2

Which of the following is a vector quantity?

• Speed

• Distance

• Time

• Displacement

What is the kinetic energy of a 2 kg object moving at 4 m/s? Use: KE = 1/2 * m * v^2

• 4 J

• 8 J

• 16 J

• 32 J

A 3 kg object moves in a circle of radius 2 m at 4 m/s. What is the centripetal force? Use: F = mv^2 / r

• 6 N

• 12 N

• 24 N

• 48 N

Which describes the energy transformation in a hydroelectric power station?

• Chemical -> Thermal

• Nuclear -> Electrical

• Gravitational Potential -> Kinetic -> Electrical

• Kinetic -> Elastic Potential

A spring is stretched 0.2 m with a spring constant of 50 N/m. What energy is stored? Use: E = 1/2 * k * x^2

• 0.2 J

• 0.5 J

• 1 J

• 2 J

A rocket launches into space by pushing gases downward. Which of Newton's Laws explains the rocket's upward motion?

• First Law

• Second Law

• Third Law

• Law of Gravitation

A ball is dropped from rest. What is its velocity after 3 seconds? Use: v = g * t, where g = 9.8 m/s^2

• 9.8 m/s

• 19.6 m/s

• 29.4 m/s

• 39.2 m/s

A 2 kg object is pulled with a force of 10 N. What is its acceleration? Use: a = F / m

• 2 m/s^2

• 4 m/s^2

• 5 m/s^2

• 10 m/s^2

Which diagram best represents balanced forces acting on an object moving at a constant speed?

• Two equal arrows pointing in opposite directions

• A single arrow pointing forwards

• A long arrow forward and a short arrow backward

• Two equal arrows pointing in the same direction