Recent content by Xisune

ii) Asks you to find the instantaneous velocity at 2 minutes, whereas i) asks you to find the average velocity during the 2 minutes.

You only need to solve the first equation, W is the work done by friction, and the system would gain kinetic energy but lose gravitational potential energy.

Since the index of refraction of oil is less than water in this case, what must the path difference be for constructive interference?

Your answer is correct, 25 electrons does not give 10^-19 N.

Yes, now use that value for Q.

If the pitchers absorb 1000J of energy in 10 minutes, how much energy will they absorb in 1 hour?

The 4-ohm resistor short circuits, thus making its resistance zero, from ohm's law. I = v/r, since r is 0, I is infinity.

Try conservation of momentum.

What is the energy before the collision? and after the collision?

Your formula is incorrect, V2 = (2GM)/r.

W = F x d, you know what d is.

W = ΔEk + ΔEp W is work due to friction. ΔEk is the change in kinetic energy. ΔEp is the change in gravitational potential energy. In this case, the hat gains kinetic energy but loses potential energy, so ΔEk is positive, and ΔEp is negative.

Use the work energy theorem.

The force the ground exerts on the person is going to last 41 cm, the initial velocity would be 0, the final velocity would be the answer to part a, from there you can solve for acceleration.

0.9m is not maximum height, so u^2 is not 17.64, but you don't need to find max height anyways. Start with the displacement equations for both components, then put those equations together to find time.