Newton's Second Law (Edexcel A-Level Mathematics): Quizzes

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F = ma
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According to Newton's Second Law, what is acceleration proportional to?

The force applied

When multiple forces act on an object, which force determines the acceleration?

The resultant force

What is true about an object moving at constant speed?

No resultant force acts on it

Under what condition will an object accelerate?

If a force is applied

What value of gg is used in the note's calculations?

9.8ms29.8 \, \text{ms}^{-2}

How is the weight of a particle calculated?

mgmg

What is the purpose of a free body diagram?

Visualise all forces on object

What is the formula for the horizontal component of a force at angle θ\theta?

Fcos(θ)F \cos(\theta)

In Example 1, what is the resultant force in the ii-direction?

6N6 \, \text{N}

In Example 2, what is the acceleration of the 8kg8 \, \text{kg} particle with parachute?

4.8ms24.8 \, \text{ms}^{-2}

How should F=maF = ma be applied for forces in different directions?

Use Fx=max\sum F_x = ma_x and Fy=may\sum F_y = ma_y

In Example 2, what resistive force does the parachute provide?

40N40 \, \text{N}

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