1) Suppose the following objects are moving at a velocity of 30 km/h. Which of them has the greatest momentum?
a) bicycle
b) jeepney
c) motorboat
d) racecar
2) Which of the following statements is TRUE?
a) In an inelastic collision, only the momentum is conserved; the total energy in the system is not conserved
b) An object with a small mass cannot have a large momentum even if the object is traveling at a high speed.
c) In any system with two objects, the loss of the momentum of one object equals the gain in momentum of the other object.
d) action-reaction forces do not cancel each other because the action force is always greater than the reaction force.
Answers
Explanation:
motorboat
b and d is True
Answer:
Q1) b) jeepney Q2) a & c are true.
Explanation:
1)Among the given vehicles, jeepney is having more mass. Thus, Momentum will be the greatest.
2) Momentum is conserved. The total momentum of two or more bodies acting upon each other remains constant unless an external force is applied.
Momentum: Momentum is the measurable quantity as the object is moving and has mass and so it has momentum.
Momentum is defined as the mass (m) times the velocity (v). If an object is steady so its velocity is zero resulting in zero momentum.
M = m X v
it's SI unit is = kg×m/s=kgm/s.
The momentum of a body depends upon the following factors :
- Mass of a body.
- The velocity of a body.
The law of conservation of momentum states that in an isolated system the total momentum of two or more bodies acting upon each other remains constant unless an external force is applied.
Therefore, momentum can neither be created nor destroyed.