6. Intro to Forces (Dynamics)

At the very top of her swing, does the rope supporting the swing exert a force on the girl, and if so, what is the direction of this force?

A uniform beam of length $L$ and mass $m$ is hinged at point A (a fixed support) and rests horizontally. A downward force $F$ is applied at the free end B. What is the vertical reaction force at support A?

If two forces $F_1$ and $F_2$ act at angles ${\theta }_1$ and ${\theta }_2$ with respect to the x-axis, what is the x component $F_x$ of the resultant force?

When a coin is tossed straight upward and reaches the very top of its path (momentarily at rest), how many forces are acting on the coin at that instant (neglecting air resistance)?

Which of the following is a property that all series circuits share in the context of forces and kinematics?

A scallop has a weight of $0.25 n$. If a net force of $0.10 n$ is applied to the scallop, how does this force compare to its weight?

A uniform beam of length $L$ and mass $m$ rests horizontally and is supported at its ends by supports A and B. If a downward point load $P$ is applied at a distance $a$ from support A, which of the following gives the correct expressions for the reaction forces at supports A ($R_A$) and B ($R_B$)?

Which statement best describes the difference between an open circuit and a closed circuit?

In a game of tug-of-war, two teams pull on opposite ends of a rope with equal but opposite forces of magnitude $F$. What is the net force on the rope?

In a rigid lever system, which of the following best describes the force applied at the handle of the lever when the lever is in equilibrium?

A book of mass $m$ rests on a horizontal table. If the book is at rest and no other forces act on it except gravity and the normal force from the table, what is the net force on the book?

Which of the following statements about $drag$ is true?

Forces of attraction limit the motion of particles most in which state of matter?

A horizontal beam is suspended by two vertical ropes at points A and D. At a certain instant, the tension in rope AB is $300 N$ and the tension in rope DE is $200 N$. What is the total weight of the beam if it is in static equilibrium and no other vertical forces act on it?

What effect does an unbalanced force have on an object?