Forces Quiz: Unit 3

What is Newton’s First Law of Motion, and how does it relate to the concept of balanced forces?

• A) Objects at rest tend to stay at rest unless acted upon by an unbalanced force.

• B) Objects in motion tend to stay in motion unless acted upon by an unbalanced force.

• C) Both A and B.

Explain how forces are related to the change in an object's motion. 

• A) Forces do not affect motion.

• B) Balanced forces cause motion, while unbalanced forces prevent it.

• C) Balanced forces do not affect motion, but unbalanced forces cause changes.

Describe Newton’s Second Law of Motion and how mass influences the acceleration of an object. 

• A)F=m×a, mass and acceleration are related to force

• B) F= a/m, force is not related to mass and acceleration

• C) F= m/a, force is not related to mass, but is related to acceleration

In a given scenario, if the forces acting on an object are doubled, how does this affect the object's motion? 

• The objects motion remains unchanged

• The motion is halved

• The objects motion doubles

• The object comes to rest

Write the formula for Newton’s Second Law and explain the meaning of each variable (force, mass, and acceleration).

• A) F= m x a, force is directly proportional to the mass and acceleration

• B) a/m, force is inversely proportional to mass and acceleration

• C) F= m/a, force is inversely proportional to mass and directly proportional to acceleration

Define the concept of a frame of reference

• A frame of reference is a stationary point from which all motion is measured

• A frame of reference is a moving point from which motion is observed

Discuss the relationship between force and acceleration.  (assuming mass remains constant)

• Force and acceleration are not related

• When Force increases, acceleration increases

• When force increases, acceleration decreases

Given two different objects with different masses, explain how the forces applied to each object might affect their motion. Consider the concepts of inertia and Newton’s Second Law.

• The object with more mass experience greater acceleration with a given force

• The object with less mass experience greater acceleration with a given force

• Both objects experience the same acceleration with a given force

• The objects do not experience acceleration at all

A hockey puck slides across the ice and eventually comes to a stop. Which statement best applies Newton’s First Law to this scenario?

• The motion of the puck stops because there is no force acting on it

• The motion of the puck stops due to a balanced force

• The motion of the puck stops due to unbalanced forces

• The motion of the puck stops because of a decrease in mass

If an object experiences a net force of 50 N to the east and another force of 15 N to the west, what can be said about the motion of the object?

• The object will accelerate to the east

• The object will accelerate to the west