Laws of Motion: Inertia

What is inertia?

• a. The tendency of an object to resist change in its motion.

• b. Equal forces acting on an object in opposite direction.

• c. A nonzero force, which changes an object’s motion.

• d. An object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force.

What is the First Law of Motion?

• a. The rate at which velocity changes. The state in which one object`s distance from another is changing.

• b. An object at rest stays at rest and an object in motion stays in motion unless acted on by an unbalanced force.

• c. The overall force on an object when all the individual forces acting on an object are added together.

• d. Equal forces acting on an object in opposite direction.

Tags

NGSS.MS-PS2-2

Because of inertia, a resting object will remain at ______.

• a. rest

• b. school

• c. a constant speed

• d. inertia

Because of inertia, a moving object will keep _______.

• a. at rest

• b. in one spot

• c. moving

• d. inertia

Objects with greater ________ also have greater inertia.

• a. speed

• b. temperature

• c. mass

• d. friction

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

You push on a car and it does not move. What is true about the inertia?

• a. The inertia is changing

• b. The inertia of the person is equal to the car

• c. The inertia of the car is too great

• d. There is not inertia because of no movement

Tags

NGSS.MS-PS2-2

The law of inertia (Newton's First Law) applies

• a. to both moving and non moving objects

• b. only to objects that are not moving

• c. only to moving objects

• d. none of the above

Which of these is an example of inertia?

• a. a person flying through the windshield during a car wreck because they weren't wearing their seat belt

• b. earth constantly traveling at the same speed in it's orbit

• c. a person staying in the vehicle and hitting the air bag during a car wreck because they are wearing a seat belt

• d. All of the above

Friction is a force that acts ____________.

• a. in the same direction as the force

• b. perpendicular to the force

• c. in the opposite direction of the force

• d. upwards only

Neglecting friction, which item needs a grater net force to move on a horizontal table, a kilogram of feathers or a kilogram of iron?

• a. Feathers

• b. They both require the same amount of force

• c. Iron

• d. Neither will move

Tags

NGSS.HS-PS2-1