Question

True and False
1. If two particles of different masses have equal kinetic energy they also have equal momentum.

2. If the momentum of a single particle is zero, its kinetic energy may not be zero.

3. The kinetic energy is always conserved both in elastic collisions and inelastic collisions.

4. A large force always produces a larger impulse on a body than a smaller force.

5. If the kinetic energy of a single particle is zero, its momentum must be zero.

6. The linear momentum of an object is proportional to the mass of the object.

7. The momentum of an isolated system is always conserved no matter what kind of force is acting inside the system.

Answer 1

1) False

2) False

3) False

4)Falso

5) True

6) True

7) True (note: I take "isolated system" to mean "closed system")

Answer 2

1) False

2) False

3) False

4)Falso

5) True

6) True

7) True

Answer 3

1)True

2)faulse

3)True

4)True

5)True

6)True

7)True

Answer 4

1. Iftwo particles ofdifferent masses have equal kinetic energy they also have equal momentum KE1-KE2 There is no possibilities that MV-mv It's a false statement 2. If the momentum ofa single particle is zero, its kinetic energy may not be zero mv-0 Either m or v is zero False 3. The kinetic energy is always conserved bothin elastic collisions and inelastic collisions False (some Ke changes to other energy like heat) 4. A large force always produces a larger impulse on abody than a smaller force True (formula for impulse is F*t so if larger the F larger the Impulse) 5. Ifthe kinetic energy ofa single particle is zero, its momentum must be zero 6. The linear momentum ofan object is proportional to the mass ofthe object 7. The momentum of an isolated system is always conserved no matter what kind offorce is True (½mv2-0 then mv = 0) True(p-mv) acting inside the svstemm True(m1v1 = m2v2)