Physics Answers

A bus travels 18 km due East at an average speed of 19 m/s, making stops along the way. After that, the bus stops at the bus station for 42 minutes for a lunch break and then continues due East another 22 km for 20 minutes. What is the bus’s average velocity over this entire drive?

A student fires a cannonball vertically upwards. The cannonball returns to the ground after a 6.60s flight. Determine all unknowns and answer the following questions. Neglect drag and the initial height and horizontal motion of the cannonball. Use regular metric units (ie. meters).

Tim rolls a marble off a horizontal lab table with an initial speed of 2.5 m/s. The marble falls a vertical distance of 1.2 m to the floor below. Air resistance can be ignored.
a) How much time does the marble spend in the air?

b) What is the speed of the marble just before it strikes the floor?

During a lightning discharge, 1500 C of charge move through a potential difference of 1.0 x 10​8​ V in 2.0 x 10​–2​ s. The energy released by this lightning bolt is: (hint: you may not need to use all the numbers provided to determine the answer.)

If 1k=Y×N×PD

Then, 1P=??

A stone is thrown upwards with initial velocity of 20 m s
-1
, the height
that stone will reach would be?

A material that has a length of 0.08m, a cross-sectional
area 0.015m2 and permeability of 430µwb/At.m. Find the
reluctance of the mate

A material that has a length of 0.08m, a cross-sectional
area 0.015m2 and permeability of 430µwb/At.m. Find the
reluctance of the material.

A truck heading east has an initial velocity of 6 m/s. It accelerates at 2 m/s2 for 12 seconds. What distance does the truck travel in the given time?

What initial observation in 1820 did Orsted make about the relationship between electricity and magnetism