6. Intro to Forces (Dynamics)

If friction did not exist, which of the following statements would be true according to Newton's First Law?

An object is acted upon by two vertical forces: one force of $10N$ upward and another force of $15N$ downward. Which of the following best describes the net force on the object?

Which of the following best describes an unbalanced force according to Newton's First and Second Laws?

Which of the following best describes how Newton's First and Second Laws explain the movement of objects and people in everyday life?

In a game of tug of war, which condition must be met for the forces to be considered balanced?

A jet plane is speeding down the runway during takeoff. Air resistance is not negligible. Which of the following best describes the net force acting on the plane as it accelerates forward?

According to Newton's First and Second Laws, how does a wrecking ball have the potential to exert force on another object?

A puck is moving at constant velocity on a frictionless air hockey table. According to Newton's First Law, what can be said about the net force acting on the puck?

Which of Newton's laws best explains why motorists should wear seat belts (buckle-up) when driving a car?

When an object has its motion changed, the cause is generally $\dots$.

Why are the brakes in a car not used like an on/off switch according to $\text{Newton's First and Second Laws}$?

Which statement best describes how a machine can help make work easier according to Newton's $1^\{ext\{st\}\}$ and $2^\{ext\{nd\}\}$ Laws?

According to $Newton’s$ First and Second Laws, what happens when someone lets go of the button on an electric doorbell?

Why is it important for people to understand Newton's laws of motion?

According to Newton's First and Second Laws, what is the primary reason your car continues to move forward while skidding to a stop from a high speed, even after you apply the brakes?