CAIE A-Level Physics AS 5.2.4 Ek 1 2 Mv2 Questions

Apply conservation of energy to transfer between gravitational potential, kinetic and internal energy stores.

Exam points

Apply conservation of energy to transfer between gravitational potential, kinetic and internal energy stores.

[Maximum number: 2]

A block of mass 0.40 kg slides in a straight line with a constant speed of $0.30 \mathrm{~m} \mathrm{~s}^{-1}$ along a horizontal surface, as shown in Fig. 3.1.

Fig. 3.1

Assume that there are no resistive forces opposing the motion of the block.
The block hits a spring and decelerates. The speed of the block becomes zero when the compression of the spring is 8.0 cm .

Calculate the initial kinetic energy of the block.
kinetic energy = J

$E_{\mathrm{K}}=\frac{1}{2} m v^{2}$ $\begin{aligned} E_{K}=0.5 \times 0.40 \times 0.30^{2} E_{K}=1.8 \times 10^{-2} \mathrm{~J} \end{aligned}$

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CAIE A-Level Physics AS 5.2.4 Ek 1 2 Mv2 Questions question 1