signment Sec (3 Internet Lab-Momentum and Collisions Website: http://phet.colora

Question

signment Sec (3 Internet Lab-Momentum and Collisions Website: http://phet.colorado.edu/ Play with the Sims Physics- Motion Collision Lab Introduction When objects move, they have momentum. Momentum, p, is the product of an object's mass (kg) and its velocity (m/s). The unit for momentum, p, is kg-m/s. During a collision objects transfer momentum E to each other, resulting in different motions than before the collision. In this activity you will study the motion colliding objects. momentum m x V ELASTIC Collisions m.vt mav m,V m2v later More Data 1. What defines a collision as being elastic? 1h inel collision, KE IS hot conserved 2. Simulate the four elastic collisions below. Complete the table using math formulas and the simulation. AFTER COLLISION 0 kg m/s O. 20 kg 2.0 kg 1.5 m/s o.00 2 25 kg 50 kg 11m/s -1.0 m/s 0 kg m/s -1.6hm/s A&m;/s 3 3.0 kg 6.0 kg 20 m/s 0.0 m/s 6 kg ms m/s m/s 6.0 kg oka 2-0 m/s -1.0 m/s 8.0 kg m/s 4.0 3. Two objects with the same mass move toward each other with the same speed and experience an elastic collision. Compare the final velocities of each object to their initial velocities. Velocities Velocities in A. A less-massive moving object has an elastic collision with a more-massive object that is not moving. Compare the initial velocity (speed and direction) of the less-massive object to its final velocity. mu vi 20 m/s (smuur spred was (KE) m/s (Small oet bakslane

Explanation / Answer

7) They both will travel in the direction of the body having larger initial momentum.

8) Let their initial speed be u1 and u2

Let their final speeds be v1 and v2

Hence by conserving momentum

mu1 + Mu2 = mv1 + Mv2

Hence

v2 = (mu1 + Mu2 -mv1) / M

9) Let their masses be m and m/2

Conserving momentum

mu1 - m/2u2 = 0

mu1 = m/2u2

u1/u2 = m/2m = 1/2

10) According to data to #1 conservation cannot be proved

Related Questions

Navigate

• Browse (All)
• Browse S
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.