PHY110_Chapter_7.pdf - PHY110 CHAPTER 7 LINEAR MOMENTUM...

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1 PHY110 CHAPTER 7 LINEAR MOMENTUM ZAIDATUL SALWA MAHMUD FACULTY OF APPLIED SCIENCES UNIVERSITI TEKNOLOGI MARA CAWANGAN PERAK KAMPUS TAPAH 05-4067388 [email protected]
Learning Outcome At the end of this chapter, you should be able to: State the definition of momentum and impulse. Explain the conservation of momentum in one dimensional collision. Analyse elastic and inelastic collision in one dimension using conservation of momentum. ZSMAHMUD/UiTMCawanganPerak/PHY110 2
Contents 7.1 Momentum and Impulse 7.2 Conservation of Momentum 7.3 One Dimensional Collision
7.1 Momentum and Impulse Momentum
5 Momentum Linear Momentum , p of an object is defined as the product of the object’s mass, m with its velocity, v . Is a vector quantity. v m p velocity mass momentum Faster moving object have higher momentum than slower moving object even when they have the same mass. Two objects with different mass moving at same speed, object with higher mass will have higher momentum . Unit: kgms -1 or Ns 7.1 Momentum and Impulse
6 Momentum – Newton’s 2 nd Law To change the momentum of an object you need force. Originally Newton’s Second Law is stated in term of momentum: t d p d F The rate of change of momentum of object is equal to the net force applied to it . 7.1 Momentum and Impulse cont
From kinematic equation: From the Newton’s 2 nd Law, we obtained: 7 at u v t u v a t u v m F t mu mv F t p F ) ( mv p where ma F Ohhh. This is how you get it. 7.1 Momentum and Impulse cont
8 1. Calculate the magnitude of the linear momentum for the following cases: a. A proton with mass 1.67 x 10 -27 kg, moving with a speed of 5.00 x 10 6 m/s.

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