Arrange the examples in order, starting with the object that has the least amount of energy. In each case, assume there’s no friction. Use g = 9.8 m/s2, PE = m × g × h, and . a book with a mass of
0.75 kilograms resting
on a shelf at a height
of 1.5 meters
a brick with a mass of
2.5 kilograms falling
with a velocity of
10 meters/second
when it’s 4 meters
above ground
a ball with a mass of
0.25 kilograms rolling
on flat ground with a
velocity of 10 meters/
second
a stone with a mass of
0.7 kilograms being
held still at a height
of 7 meters

↑

↑

↑

Anne applies a force on a toy car and makes it move forward. what can be said about the forces acting on the toy car at the moment anne applies the force?

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Point charges q1=+2.00μc and q2=−2.00μc are placed at adjacent corners of a square for which the length of each side is 1.50 cm . point a is at the center of the square, and point b is at the empty corner closest to q2. take the electric potential to be zero at a distance far from both charges. part a what is the electric potential at point a due to q1 and q2? express your answer with the appropriate units.