IB Physics HL A.2.13 Weight and gravitational-field variation Question Bank

Practise IB Physics HL A.2.13 by analysing weight components and how changing gravitational fields affect force calculations.

Exam points

Calculate weight when gravitational field strength changes with location or altitude.
Resolve weight into components and combine it with tension, friction or other forces.
Evaluate a weight model using the field assumptions and the stated reference frame.

[Maximum number: 1]

A girl rides a bicycle that is powered by an electric motor. A battery transfers energy to the electric motor. The emf of the battery is 16 V and it can deliver a charge of 43 kC when discharging completely from a full charge.

The bicycle and the girl have a total mass of 66 kg . The girl rides up a slope that is at an angle of $3.0^{\circ}$ to the horizontal.

Figure for Question A.2.13—Weight question 1 — IB Physics HL

Calculate the component of weight for the bicycle and girl acting down the slope.

$66 \mathrm{~g} \sin \left(3^{\circ}\right)=34$ « N »

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A.2.13—Weight question 1