A physics student is riding on a train traveling north. Having read about inertia, the student performs an experiment with a golf ball. He reaches over the aisle and drops the ball from rest. Instead of hitting the floor directly below the student's hand, it hits to the north, i.e., forward of that position. Which of the following might be the cause for this to happen?
a. The train is moving at constant velocity.
c. The train is slowing down.
b. The train is speeding up.
d. Whatever the cause, it cannot be any of the answers given.
Question 2
On a velocity-time graph for a particle, suppose the plot starts at some positive velocity and then follows a straight line to zero at a later time. Which of the following must be true about a position vs. time graph for this same time interval?
a. The curve will start at a positive position value and follow a straight line to zero at the later time.
b. The curve will rise steeply at first and as time goes on will level out approaching its highest position value at the later time.
c. The curve will drop steeply at first and as time goes on will approach its lowest position value at the later time
d. The curve will start at the zero of position and follow a straight line to its highest position at the later time.
Species richness of birds in North America.
Influences on Temperature: South-facing slopes are typically more vegetated than north-facing ...
Physics
Physics
Physics
Physics