# Nathan Ashcroft

Physics teacher | Tutor for 8 years

I hold a degree in Physics from Eastern Mennonite University. With a passion for unraveling the mysteries of the universe, I thrive on sharing my knowledge with students. From classical mechanics to quantum theory, I offer clear explanations and engaging lessons to foster deep understanding. Let's explore the wonders of physics together, tackling questions across various subjects.

## Questions

A ball with a mass of #256 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #27 (kg)/s^2# and was compressed by #12/4 m# when the ball was released. How high will the ball go?

An object with a mass of #8 kg# is on a plane with an incline of # - pi/6 #. If it takes #9 N# to start pushing the object down the plane and #4 N# to keep pushing it, what are the coefficients of static and kinetic friction?

What are some common mistakes students make with nuclear reactions?

How does the electrostatic force exerted by a proton on an electron compare to the electrostatic force exerted by an electron on a proton?

A ball with a mass of #18 kg# moving at #2 m/s# hits a still ball with a mass of #25 kg#. If the first ball stops moving, how fast is the second ball moving? How much kinetic energy was lost as heat in the collision?

What is the cross product of #[0,8,5]# and #[1,2,-4] #?

What torque would have to be applied to a rod with a length of #7 m# and a mass of #9 kg# to change its horizontal spin by a frequency #12 Hz# over #9 s#?

An object, previously at rest, slides #9 m# down a ramp, with an incline of #(pi)/3 #, and then slides horizontally on the floor for another #6 m#. If the ramp and floor are made of the same material, what is the material's kinetic friction coefficient?

If a #5 kg# object moving at #6 m/s# slows to a halt after moving #2 m#, what is the coefficient of kinetic friction of the surface that the object was moving over?

What are Einstein’s “spooky actions”?

Two objects have masses of #5 MG# and #7 MG#. How much does the gravitational potential energy between the objects change if the distance between them changes from #90 m# to #2000 m#?

What is 75 m/min converted to mi/h?

An object with a mass of #6 kg# is pushed along a linear path with a kinetic friction coefficient of #u_k(x)= 2+cscx #. How much work would it take to move the object over #x in [(3pi)/4, (7pi)/8], where x is in meters?

Does a change in the medium through which a wave is travelling change its frequency?

A circuit with a resistance of #6 Omega# has a fuse that melts at #8 A#. Can a voltage of #28 V# be applied to the circuit without blowing the fuse?

About 40 J is required to push a crate 4 m across a floor. If the push is in the same direction as the motion of the crate, what is the force on the crate?

A circuit with a resistance of #8 Omega# has a fuse with a capacity of #3 A#. Can a voltage of #15 V# be applied to the circuit without blowing the fuse?

A projectile is shot from the ground at a velocity of #13 m/s# and at an angle of #(5pi)/12#. How long will it take for the projectile to land?

A spring with a constant of #4 (kg)/(s^2)# is lying on the ground with one end attached to a wall. An object with a mass of #7 kg # and speed of # 5 m/s# collides with and compresses the spring until it stops moving. How much will the spring compress?

A model train with a mass of #2 kg# is moving along a track at #36 (cm)/s#. If the curvature of the track changes from a radius of #9 cm# to #3 cm#, by how much must the centripetal force applied by the tracks change?