Work, Energy, and Power in Physics
In a collision between two isolated particles where only conservative forces do work, which quantity must remain constant for both particles together after considering work-energy principles?
Potential energy of each particle.
Total mechanical energy.
Momentum of each particle.
Kinetic energy of each particle.
What effect would halving both mass and velocity have on an object's kinetic energy?
It remains unchanged.
It decreases by half.
It decreases by a factor of eight.
It decreases by a factor of four.
Which quantity can be calculated by multiplying the net external force acting on an object by the time interval over which it acts?
Weight
Velocity
Impulse
Acceleration
A pendulum swings from its lowest point (A) up to a maximum height (B), what is the correct relationship between kinetic energy at A and potential energy at B?
Kinetic energy at point A remains the same as potential energy at point B due to work-energy principles.
The total mechanical energy is not conserved due to non-conservative forces acting on the pendulum.
Potential energy increases from A to B while kinetic energy still has a value greater than zero at B.
Kinetic energy at point A is entirely converted into potential energy at point B in absence of friction or air resistance.
A ball is thrown straight up with initial velocity ; which new initial velocity will quadruple its maximum height reached?
A wheel rolling without slipping on a flat surface translates kinetic energy into what other type(s) of kinetic energy?
Vibrational kinetic energy only.
Translational kinetic energy and rotational kinetic energy only.
Translational kinetic energy only.
Vibrational kinetic energy and rotational kinetic energy.
What is the relationship between net work done by external forces and change in kinetic energy of an object according to the work-energy theorem?
Net work is unrelated to changes in an object’s kinetic energy.
Net work causes a change in potential, not kinetic, energy.
They are directly equal; net work changes an object’s kinetic energy.
Kinetic energy only depends on mass, not on net work.

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In an experiment where two identical masses collide on a horizontal surface with velocities such that their total momentum is zero, how should their individual speeds relate before collision so that post-collision they stick together maximizing thermal energy production?
They should have equal and opposite velocities.
Both should move at varying speeds but same direction.
They should move perpendicular to each other with equal speed.
One should be stationary while the other moves at twice its speed.
A cylindrical rod pivoted at one end swings down from rest under gravity and strikes a linear spring perpendicularly compressing it; what maximum compression does the spring experience given that its stiffness equals times the weight per unit length where ?
X_max = nL
X_max = L/(sqrt(n))
X_max = sqrt(L/n)
X_max = L * n
A car of mass m accelerates from rest down a hill inclined at angle θ to horizontal; how does increasing θ affect the net work done on it when traveling distance d?
Decreases regardless of slipping or rolling.
Increases if there's no sliding friction.
Varies inversely with cosine of θ.
Remains constant as long as d stays same.