IB Physics HL A 3 5 Work Energy Change Questions

Practise HL work–energy calculations across ramps, rough surfaces, force graphs, electric fields and spacecraft energy changes.

Exam points

Relate work done by the resultant force on a system to the change in its energy.
Apply work–energy reasoning to calculate kinetic or potential energy changes from complete mark-scheme evidence.

[Maximum number: 2]

A girl on a sledge is moving down a snow slope at a uniform speed.

Figure for Question IB Physics HL A 3 5 Work Energy Change Questions question 1 — IB Physics HL

The sledge, without the girl on it, now travels up a snow slope that makes an angle of $6.5^{\circ}$ to the horizontal. At the start of the slope, the speed of the sledge is $4.2 \mathrm{~m} \mathrm{~s}^{-1}$ . The coefficient of dynamic friction of the sledge on the snow is 0.11 .

Calculate the distance along the slope at which the sledge stops moving.

Assume that the coefficient of dynamic friction is constant.

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IB Physics HL A 3 5 Work Energy Change Questions question 1