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Step-by-step explanation:
8. Two billiard balls collide. Ball 1 moves with a velocity of 6 m/s, and ball 2 is at rest.
After the collision, ball 1 comes to a complete stop. What is the velocity of ball 2
after the collision? The mass of each ball is 0.20 kg.
a. 6m/s
b. 2 m/s
c. 12m/s
d. 0
9. A 1.2- kilogram block and a 1.8-kilogram block initially at rest on a frictionless,
horizontal surface. When a compressed spring between the blocks is released, the
1.8 kg block moves to the right at 2m/s as shown.
?
2.0 m/s
1.2 kg
1.8 kg
Frictionless honizontal surface
What is the speed of the 1.2 kg block after the spring is released?
a. 1.4 m/s
b. 2.0 m/s
C. 3.0 m/s
d. 3.6m/s
10. Shankha is going by a slippery snowy hill. He has a mass of 20kg, and he is sliding the
hill at a velocity of 5m/s. Shankha's elder brother has a mass of 30kg. His brother is moving
slower with a velocity of 2m/s. Shankha collides with his brother. Then both of them keep
going down the hill as one unit. Calculate the resulting velocity of Shankha.
a 7.0m/s
b. 3.20 m/s
c. 5.Orn/s
d. 3.0 ml1. The law of conservation of momentum is applicable for
a. A system of particles
b. Two particles
c. Individual particle
d. None of these
2. Conservation of linear momentum is when
a. Initial momentum is equal to final momentum
b. Initial momentum and final momentum are the product
C. Initial momentum is less than final momentum
d. Initial momentum is more than final momentum
3. The working principle of a rocket is based on the conservation of?
a Mass
b. Energy
c. Momentum
d. Impulse
4. Which is a necessary condition for the total momentum of a system to be conserved?
a. Kinetic energy must not change.
b. No external force is present.
c. An object must be at rest.
d. Only the force of gravity acts on the system.
5. The total momentum of a system is always?
a conserved
b. destroyed
c.created
dadded34°42'30.3"N
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