3. the graph below shows lines representing speed
vs. time for an accelerating aircraft, prepared by
observers at two different locations on the runway.
speed vs. time
referat
(s/w) a pəəds
bel
1930
a
l
10
1.00
2.00
5.00
6.00
3.00 4.00
time, t(s)
(a) what is the equation for line (a)?
(b) what is the equation for line (b)?
(c) what is the acceleration of the aircraft according
to line (a)?
(d) what is the acceleration of the aircraft according
to line (b)?
(e) explain why the y-intercept for line (b) is
different than the intercept for line (a).

Suppose you were asked to find the torque about point p due to the normal force n in terms of given quantities. which method of finding the torque would be the easiest to use?

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger