IB Physics SL A 2 19 Newtons Second Law Forms Questions

Practise applying Newton’s second law to force balance, connected bodies, lifts, resistive motion and changes in momentum.

Exam points

Apply Newton’s second law as F = ma for constant mass and as F = Δp/Δt when mass changes.
Calculate resultant force, acceleration, mass or momentum rate from complete force and motion evidence, stating the system boundary.

[Maximum number: 1]

This question is in two parts. Part 1 is about simple harmonic motion and forced oscillations. Part 2 is about electric and magnetic force fields.

Part 1 Simple harmonic motion and forced oscillations
The graph shows the variation with time of the displacement of an object undergoing simple harmonic motion.
displacement / mm

Figure for Question IB Physics SL A 2 19 Newtons Second Law Forms Questions question 1 — IB Physics SL

time / ms

Part 2 Electric and magnetic force fields

The diagram shows two isolated electrons, X and Y , initially at rest in a vacuum. The initial separation of the electrons is 5.0 mm . The electrons subsequently move apart in the directions shown.

Calculate the initial acceleration of one electron due to the force in (c)(i).

$1.0 \times 10^{7} \mathrm{~ms}^{-2}\left(9.9 \times 10^{6} \mathrm{~ms}^{-2}\right.$ if $9 \times 10^{-24} \mathrm{~N}$ used );

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IB Physics SL A 2 19 Newtons Second Law Forms Questions question 1