# Adrian Ayala

Physics teacher | Experienced educator in USA

I hold a degree in Physics from The American College of Financial Services. With a passion for unraveling the mysteries of the universe, I bring a deep understanding of physics concepts to my teaching. From classical mechanics to quantum theory, I strive to make complex topics accessible and engaging for my students. With a dedication to fostering a supportive learning environment, I aim to empower students to excel in their academic pursuits and develop a lifelong love for physics. Let's explore the wonders of the universe together.

## Questions

A ball with a mass of #300 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #12 (kg)/s^2# and was compressed by #7/6 m# when the ball was released. How high will the ball go?

A projectile is shot from the ground at a velocity of #15 m/s# at an angle of #(5pi)/12#. How long will it take for the projectile to land?

An object with a mass of #4 kg# is on a ramp at an incline of #pi/8 #. If the object is being pushed up the ramp with a force of # 2 N#, what is the minimum coefficient of static friction needed for the object to remain put?

A model train, with a mass of #4 kg#, is moving on a circular track with a radius of #5 m#. If the train's rate of revolution changes from #1/9 Hz# to #1/5 Hz#, by how much will the centripetal force applied by the tracks change by?

A model train, with a mass of #2 kg#, is moving on a circular track with a radius of #8 m#. If the train's rate of revolution changes from #1/2 Hz# to #2/5 Hz#, by how much will the centripetal force applied by the tracks change by?

An object with a mass of #8 kg# is moving at #7 m/s# over a surface with a kinetic friction coefficient of #6 #. How much power will it take to accelerate the object at #8 m/s^2?

Some very hot rocks have a temperature of #450 ^o C# and a specific heat of #270 J/(Kg*K)#. The rocks are bathed in #15 L# of boiling water. If the heat of the rocks completely vaporizes the water, what is the minimum combined mass of the rocks?

Two objects, no matter what their mass is, will reach the ground at the same time, because...?

A man wearing a bulletproof vest stands still on roller skates. The total mass is 80 kg. A bullet of mass 20 grams is fired at 400 m/s. It is stopped by the vest and falls to the ground. What is the velocity of the man?

An object with a mass of # 2 kg# is traveling in a circular path of a radius of #2 m#. If the object's angular velocity changes from # 2 Hz# to # 5 Hz# in # 1 s#, what torque was applied to the object?

A spring with a constant of #12 (kg)/s^2# is lying on the ground with one end attached to a wall. An object with a mass of #6 kg# and speed of #3 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?

An object travels North at # 5 m/s# for #1 s# and then travels South at # 3 m/s# for # 2 s#. What are the object's average speed and velocity?

A plane could fly at an average speed of 694 m/s. Calculate how long it would take the plane to fly around the world (which is #4.00 xx 10^7\ "m"#)?

Clarification on universal gravitational potential energy re: planet orbiting a star?

A charge of #4 C# is passing through points A and B on a circuit. If the charge's electric potential changes from #5 J# to #1 J#, what is the voltage between points A and B?

Mike is playing his speaker at an unknown frequency. His friend, Emma, gets on her bike and rides away from Mike at a uniform speed, holding an open-air column horizontally over her head. What was the frequency of the sound coming from Mike's speaker?

If an object with a mass of #10 kg # is moving on a surface at #45 m/s# and slows to a halt after # 6 s#, what is the friction coefficient of the surface?

If an object with a mass of #10 kg # is moving on a surface at #15 ms^-1# and slows to a halt after # 4 s#, what is the friction coefficient of the surface?

An object with a mass of #24 kg# is hanging from an axle with a radius of #16 m#. If the wheel attached to the axle has a radius of #72 m#, how much force must be applied to the wheel to keep the object from falling?

A cylinder has inner and outer radii of #9 cm# and #14 cm#, respectively, and a mass of #9 kg#. If the cylinder's frequency of counterclockwise rotation about its center changes from #1 Hz# to #7 Hz#, by how much does its angular momentum change?