# Sebastian Acosta

Physics teacher | Verified Expert

I hold a degree in Physics from Clarkson University, where I honed my passion for unraveling the mysteries of the universe. With a penchant for inquiry and discovery, I thrive on guiding students through the complexities of physics. My journey from Clarkson has equipped me with a deep understanding of theoretical concepts and practical applications. From classical mechanics to quantum theory, I am committed to fostering a deeper appreciation for the wonders of physics. With tailored approaches and engaging strategies, I aim to inspire curiosity and instill confidence in every student I teach. Let's explore the universe together.

## Questions

A model train with a mass of #8 kg# is moving along a track at #9 (cm)/s#. If the curvature of the track changes from a radius of #180 cm# to #63 cm#, by how much must the centripetal force applied by the tracks change?

A wagon is pulled at a speed of 0.40 meters/sec by a horse exerting an 1,800-newton horizontal force. What is the power of this horse?

A ball with a mass of #144 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #16 (kg)/s^2# and was compressed by #6/4 m# when the ball was released. How high will the ball go?

A sprinter runs 100 meters in 11.5 seconds. What is the runner's average running rate in meters per second?

How much work would it take to push a # 1 kg # weight up a # 3m # plane that is at an incline of # pi / 4 #?

What is the force, in terms of Coulomb's constant, between two electrical charges of #-6 C# and #-16 C# that are #9 m # apart?

A projectile is shot at a velocity of # 7 m/s# and an angle of #pi/8 #. What is the projectile's peak height?

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 #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?

What is the difference between constructive and destructive interference?

How much force is needed to cause an acceleration of #25m/s^2# in an object of mass #7kg.#?

An object with a mass of #4 kg# is lying still on a surface and is compressing a horizontal spring by #1/4 m#. If the spring's constant is # 8 (kg)/s^2#, what is the minimum value of the surface's coefficient of static friction?

A cylinder has inner and outer radii of #8 cm# and #16 cm#, respectively, and a mass of #6 kg#. If the cylinder's frequency of counterclockwise rotation about its center changes from #2 Hz# to #7 Hz#, by how much does its angular momentum change?

A balanced lever has two weights on it, the first with mass #7 kg # and the second with mass #3 kg#. If the first weight is # 2 m# from the fulcrum, how far is the second weight from the fulcrum?

Can somebody determine the point between these charges where the electric field force equals to zero? Thank you!

If #7/4 L# of a gas at room temperature exerts a pressure of #16 kPa# on its container, what pressure will the gas exert if the container's volume changes to #13/12 L#?

What is the gravitational potential energy of a # 1 kg# object on a shelf # 5 m # high?

A bicycle wheel rotates uniformly through 2.0 revolutions in 4.0 s. What is the frequency of the wheel's rotation?

A model train with a mass of #4 kg# is moving along a track at #6 (cm)/s#. If the curvature of the track changes from a radius of #32 cm# to #45 cm#, by how much must the centripetal force applied by the tracks change?