The tendency of an object to resist a change in its state of motion is called the object's ______.

• velocity

• motion

• friction

• inertia

Without a net force acting on an object, the moving object will move forever in a ______ line.

• circular

• horizontal

• straight

• vertical

Objects at rest remain at rest until a _________acts on them.

• force

• velocity

• inertia

• acceleration

An object in motion will stay in what kind of motion when the net force acting on it is zero?

• uniform acceleration

• accelerating motion in a straight line

• uniform motion

• circular motion

What kind(s) of objects have inertia?

• all objects with mass
• only objects at rest
• only objects in motion
• only objects whose motion is being changed

An object following a straight-line path at a constant speed 

• has zero acceleration
• has no forces acting on it
• has a net force acting in the direction of motion
• none of these

What is Newton's First Law all about?

• conditions for uniform motion

• unbalanced forces

• relationship of force and acceleration

• gravitational acceleration

A bus is moving at a constant speed in a straight line, which statement is true

• The net force on the bus is constant and has the same direction with the bus velocity.

• There are no forces acting on the bus.

• The net force on the bus is zero.

• A net force is required to keep the bus moving.

Describe what will happen to the truck in this picture

• Accelerate

• Decelerate

• Constant speed

• Stationary

Describe what will happen to the truck in this picture

• Accelerate

• Decelerate

• Constant speed

• Stationary