Pecutan
- Pecutan ialah kadar perubahan halaju. Ia mengukur betapa cepatnya halaju sesuatu objek berubah.
- Pecutan ialah kuantiti vektor. Ia mempunyai magnitud dan arah.
- Unit SI bagi pecutan ialah meter sesaat sesaat (ms-2).
- Jika halaju pergerakan berkurang, nilai pecutan menjadi negatif dan ia dikatakan mengalami nyahpecutan.
Acceleration
- Acceleration is defined as the rate of velocity change. It is a measure of how fast the velocity change.
- Acceleration is a vector quantity.
- The unit of acceleration is ms-2.
- An object moving with a velocity that is decreasing is said to be experiencing deceleration.
Contoh:
Sebuah kereta bergerak dari pegun mencapai halaju 36 ms-1 dalam 8 saat. Berapakah pecutan kereta itu?
A car travels from a stationary position and reach a velocity of 36 ms-1 in 8 seconds. What is the acceleration of the car?
Answer:
Halaju awal, u = 0
Halaju akhir, v = 36 ms-1
Masa yang diambil, t = 8s
Pecutan, a = ?
Sebuah kereta bergerak dari pegun mencapai halaju 36 ms-1 dalam 8 saat. Berapakah pecutan kereta itu?
A car travels from a stationary position and reach a velocity of 36 ms-1 in 8 seconds. What is the acceleration of the car?
Answer:
Halaju awal, u = 0
Halaju akhir, v = 36 ms-1
Masa yang diambil, t = 8s
Pecutan, a = ?
Nota Tambahan
- Objek yang mengalami perubahan halaju dikatakan memecut.
- Perubahan halaju mungkin adalah
- perubahan laju
- perubahan arah
- Suatu objek dikatakan bergerak dengan pecutan seragam, apabila halajunya berubah dengan kadar yang tetap.
Additional Notes
- An object that experiences changes in velocity is said to have acceleration.
- Changes of velocity can be
- change of speed
- change of direction
- An object traveling with a constant acceleration, a, if the velocity changes at a constant rate.
