6. Intro to Forces (Dynamics)

Three ropes pull on a ring in a plane. Rope 1 pulls with a force of magnitude $F$ to the right, Rope 2 pulls with a force of magnitude $F$ upward, and Rope 3 pulls at an angle of $225°$ (measured counterclockwise from the positive x-axis). If the ring remains at rest, what is the magnitude of the force provided by the third rope, in terms of $F$?

Under what condition does the proportional form of Newton's second law, which states that force is proportional to acceleration, become an equation of the form $F=ma$?

Newton's first law is a description of what basic property of our universe?

According to Newton's laws, the maximum speed at which you can travel and still steer quickly out of the way on a flat road is determined by which of the following factors?

A block of mass $m$ is suspended by two vertical cables, cable 1 and cable 2, such that the block is at rest. If the tension in cable 1 is $t_1$ and the tension in cable 2 is $t_2$, which of the following expressions gives $t_1$ in terms of $m$ and $g$ only, without depending on $t_2$?

According to Newton's First and Second Laws, what happens when you decrease the thrust on your scooter while riding at constant speed?

According to Newton's First and Second Laws, which physical quantity determines a body's resistance to changes in its state of motion, such as acceleration or deceleration, when a force is applied?

When attempting to stop on a slippery road, the best action to take is:

In the figure, a block slides along a path that is without friction. According to $N’s$ First Law, what will happen to the block after it leaves the end of the path?

According to Newton's First and Second Laws, what happens when two objects of different masses experience the same net force?

An apple of mass $m$ is held at rest above the ground and then released. What is the net force acting on the apple immediately after it is released?

According to Newton's Second Law, which equation correctly expresses how to find the net force acting on an object of mass $m$ experiencing acceleration $a$?

According to Newton's Second Law, what does it mean to say that force and acceleration have a direct relationship?

A rocket is being launched straight up. Air resistance is not negligible. Which of the following best describes the net force acting on the rocket immediately after launch?

According to Newton's First Law, what is the relationship between the mass $m$ of an object and its inertia $I$?