# Charles Aeschliman

Physics teacher | Verified Expert

I hold a degree in Physics from Belmont University, where I delved into the intricacies of the universe. With a passion for unraveling its mysteries, I guide students through the wonders of physics, igniting curiosity and understanding. My journey through academia has equipped me with a deep understanding of various subjects beyond physics, ensuring a comprehensive approach to education. From classical mechanics to quantum theory, I strive to make complex concepts accessible and engaging. Let's embark on a journey of discovery together, where questions are welcomed, and knowledge knows no bounds.

## Questions

An object with a mass of #9# #kg# is on a plane with an incline of #- pi/4 #. If it takes #15# #N# to start pushing the object down the plane and #7# #N# to keep pushing it, what are the coefficients of static and kinetic friction?

How do force and momentum relate?

A box with an initial speed of #8 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #7/4 # and an incline of #(2 pi )/3 #. How far along the ramp will the box go?

If a projectile is shot at a velocity of #15 m/s# and an angle of #pi/4#, how far will the projectile travel before landing?

An object with a mass of # 5 kg# is lying still on a surface and is compressing a horizontal spring by #2 m#. If the spring's constant is # 8 (kg)/s^2#, what is the minimum value of the surface's coefficient of static friction?

Two charges of # -6 C # and # 4 C# are positioned on a line at points # -6 # and # 9 #, respectively. What is the net force on a charge of # -1 C# at # 1 #?

What is the speed of an object that travels from #( -2,1,2) # to #( -3, 0,-6 ) # over #3 s#?

How does acceleration differ from force?

What is the electric current produced when a voltage of #4 V# is applied to a circuit with a resistance of #80 Omega#?

What is the coil current 2ms after being connected to the supply if a coil of inductance 0.5H and resistance 500#Omega# is connected across a 250V DC supply? (The time constant T of the circuit is 1ms).

An object with a mass of #7 kg# is revolving around a point at a distance of #4 m#. If the object is making revolutions at a frequency of #7 Hz#, what is the centripetal force acting on the object?

An electric toy car with a mass of #2 kg# is powered by a motor with a voltage of #12 V# and a current supply of #6 A#. How long will it take for the toy car to accelerate from rest to #4/5 m/s#?

What is the unit vector that is orthogonal to the plane containing # (29i-35j-17k) # and # (41j+31k) #?

Some very hot rocks have a temperature of #450 ^o C# and a specific heat of #180 J/(Kg*K)#. The rocks are bathed in #9 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?

A solid disk, spinning counter-clockwise, has a mass of #4 kg# and a radius of #3 m#. If a point on the edge of the disk is moving at #8 m/s# in the direction perpendicular to the disk's radius, what is the disk's angular momentum and velocity?

What torque would have to be applied to a rod with a length of #4 m# and a mass of #2 kg# to change its horizontal spin by a frequency #8 Hz# over #8 s#?

A box with an initial speed of #5 m/s# is moving up a ramp. The ramp has a kinetic friction coefficient of #3/4 # and an incline of #(2 pi )/3 #. How far along the ramp will the box go?

A force field is described by #<F_x,F_y,F_z> = < xy +z , xy-x, xz > #. Is this force field conservative?

A model train with a mass of #4 kg# is moving along a track at #21 (cm)/s#. If the curvature of the track changes from a radius of #42 cm# to #90 cm#, by how much must the centripetal force applied by the tracks change?

How much work does it take to raise a #2 kg # weight #1 m #?