INERTIA

when the mass of an object decreases,

• the energy of the object increases

• the acceleration of the object increases

• the velocity of the object decreases

• the inertia of the object decreaes

the figure below shows an oil tanker in motion. the tanker takes five to ten kilometers to stop in an emergency. this situation happens due to

• low resistance between the tanker and seawater

• strong current

• inertia of the tanker

• large force acting on the tanker

the figure below shows a cardboard between a glass and a coin. if the cardboard is pulled, the coin will drop into the glass. which law of motion can best explain this situation?

• Newton's first law of motion

• Newton's second law of motion

• Newton's third law of motion

• Principle of the conservation of momentum

if you are sitting in a car, what will happen to you if the car suddenly accelerates?

• remain stationary

• move up vertically

• surge forward

• fall backward

the figure below shows the conditions of a boy carry two different pails. the boy can carry and move an empty pail easily. when the pail is fully filled with water, he faces difficulty to carry and move the pail. this is because the empty pail has

• a smaller inertia

• a smaller resistance

• a smaller friction to the surface

• a smaller momentum