Unit 3 Forces Review

Which of the following quantities must be acting on an object in order for it to change its velocity?

• Speed

• Acceleration

• Force

• Inertia

The unit "Newton" is a measure of which of the following?

• Kilograms per second

• Meters per second squared

• Kilograms multiplied by meters per second squared

• Force per meter

Which property of an object determines its resistance to changes in motion?

• Mass

• Weight

• Acceleration

• Friction

An object is accelerating if a net force is applied. Which of the following must also be true about this object?

• The object is losing mass.

• The object is speeding up.

• The object’s direction or speed is changing.

• The object is stationary.

When comparing two objects, one with greater mass and one with lesser mass, under the same applied force, which of the following statements is correct?

• The object with more mass will accelerate faster.

• The object with less mass will accelerate faster.

• Both objects will accelerate at the same rate.

• Acceleration does not depend on mass.

Which of the following is true about friction between two surfaces?

• Friction always increases the speed of an object.

• Friction is greater on smoother surfaces.

• Friction opposes motion and works in the opposite direction.

• Friction is only present when an object is accelerating.

What is the gravitational force acting on an object commonly referred to as?

• Mass

• Acceleration

• Weight

• Density

Which of the following statements about static and kinetic friction is correct?

• Kinetic friction is greater than static friction.

• Static friction is greater than kinetic friction.

• Kinetic friction occurs when an object is at rest.

• Static friction only occurs after an object has started moving.

Which of the following describes the relationship between mass and inertia?

• Objects with more mass have more inertia.

• Objects with more mass have less inertia.

• Inertia depends on the object’s speed, not its mass.

• Inertia only occurs in objects that are not moving.

Which type of force is described as forces that are equal in size but opposite in direction, resulting in no change in motion?

• Balanced forces

• Unbalanced forces

• Gravitational forces

• Frictional forces