Latihtubi Bab 7 20.10

Soalan 10

Spring di dalam kereta mainan yang berjisim
100 g dimampatkan sebanyak 8 cm dan
tenaga keupayaan yang tersimpan dalam
spring ialah 5 N.
Apabila kereta dilepaskan, spring melancarkan
kereta mainan dengan halaju v ms-1.
Dengan menganggap, tiada kehilangan
tenaga, hitung halaju maksimum yang boleh
dicapai oleh kereta mainan tersebut

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Soalan 11

Sebiji buah durian berjisim 1.5 kg jatuh daripada
pokok pada ketinggian 2.5 m.
Kira
(a) Halaju buah durian itu sejurus sebelum ia

menghentam permukaan tanah.
(b) (b) Kuantiti tenaga kinetik bola itu sejurus

sebelum ia menghentam permukaan tanah.
(Pecutan graviti dianggarkan 10 ms-2 )

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Homework

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