B2 Laws of motion: Pearson BTEC National Applied Science (AAQ) Questions

Practise b2 laws of motion with Pearson BTEC National Applied Science (AAQ) questions and mark schemes. Revise B2.1 Newton’s First Law of Motion – the application of a resultant force to make an object move or stop, B2.2 Definitions of inertia, mass and weight, B2.2.1 inertia as a resistance to change in motion.

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What to revise

• B2.1 Newton’s First Law of Motion – the application of a resultant force to make an object move or stop
• B2.2 Definitions of inertia, mass and weight
• B2.2.1 inertia as a resistance to change in motion
• B2.2.2 gravitational field strength (g) and weight
• B2.2.3 calculations for weight, equation 𝑊𝑊 = 𝑚𝑚𝑚𝑚
• B2.3 Calculation of the coefficient of friction (μ) using the equation: force 𝐹𝐹 = 𝜇𝜇𝜇𝜇 where N is the normal reaction force, the weight of object on a horizontal surface
• B2.3.1 measuring coefficient of static friction, where F is the force applied just as the object is about to move
• B2.3.2 measuring coefficient of dynamic (kinetic) friction, where F is the force applied to keep the object moving at a constant velocity
• B2.4 Calculating the momentum (p) of objects using the equation 𝑝𝑝 = 𝑚𝑚𝑚𝑚
• B2.5 Using Newton’s Second Law of Motion, force is proportional to rate of change of momentum, to include: 𝐹𝐹 = (𝑚𝑚𝑚𝑚−𝑚𝑚𝑚𝑚) 𝑡𝑡 and 𝐹𝐹 = 𝑚𝑚𝑚𝑚 force is proportional to acceleration for a constant mass
• B2.5.1 calculations using Newtons Second Law
• B2.5.2 implications for transportation when travelling at high speed with low mass and low speed with high mass
• B2.5.3 use of impact force controls
• B2.6 Newton’s third law of motion action and reaction are equal and opposite
• B2.7 Know that if F is the resultant force on an object, the object accelerates, if the forces are balanced F is zero and the object is moving at a constant velocity or stationary
• B2.7.1 effect of air resistance, drag and terminal velocity in different applications, to include

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