6. Intro to Forces (Dynamics)

According to Newton's First Law, what will happen to an object in motion if no unbalanced force acts on it?

According to Newton's First and Second Laws ($F_{\mathrm{net}}=ma$), what primarily determines the direction in which a personal watercraft (PWC) will travel when a force is applied?

An object cannot remain at rest unless which of the following holds?

According to Newton's First and Second Laws, what force primarily causes a man who jumps from the roof of his house and lands on his feet to decelerate upon hitting the ground?

A $5 \mathrm{kg}$ box is being pushed to the right with a force of $20 N$ while friction exerts a force of $8 N$ to the left. What is the magnitude and direction (right or left) of the net force acting on the box?

According to Newton's First and Second Laws, what happens to an object when an unbalanced force acts on it?

According to Newton's Second Law, if a force is exerted on an object, what is the resulting effect on the object's motion?

According to Newton's First Law, for an object to remain at rest, which of the following must be true about the forces acting on it?

According to Newton's Second Law, what does the sum of all forces acting on an object equal to? $\sum F$ = $ma$

When driving through a curve at normal speed, which force is primarily responsible for keeping the car moving along the curved path?

Consider an object at rest. Which of the following is true concerning this object?

Two blocks, A and B, with masses $m_A$ and $m_B$ respectively, are in contact on a frictionless horizontal surface. A constant horizontal force $F$ is applied to block A, pushing both blocks to the right. What is the magnitude of the force that block A exerts on block B?

Stopping a vehicle with good brakes from $20\mathrm{miles}/\mathrm{hour}$ under good conditions requires about how many feet of stopping distance?

According to Newton's First and Second Laws, if a truck and a car are both moving at the same speed $v$ and apply the same braking force $F$, how does the stopping distance of the truck on a wet road compare to that of the car?

Which of the following correctly describes Newton's First and Second Laws of Motion?