Question
http://hyperphysics.phy-astr.gsu.edu/hbase/hpul2.html#c2
Look at the diagram of the apparatus (in Basic Concepts). Suppose the mass of the cart is greater than the mass hanging on the end of the string: mC > mH
a) When the cart is released, the force sensor measures the force exerted on the cart (the tension in the string pulling it), and the computer creates a graph of force (on the y-axis) vs. time (on the x-axis). Ideally: as the mass accelerates, what should this graph look like after the cart is released and before it hits the barrier? a parabola starting from the origin and decreasing in magnitude a straight line starting from the origin and decreasing in magnitude O start as a straight line increasing in magnitude, and then level off to a flat line a straight line starting from the origin and increasing in magnitude O a parabola starting from the origin and increasing in magnitude O a straight line parallel to the x-axis b) You are supposed to start the system at rest. If the cart is initially moving with some Vo, what would happen to T, the magnitude of the tension in the cord, and a, the magnitude of the acceleration of the cart? both T and a decrease T decreases, a remains t Tincreases, a decreases both T and a remain the same both T and a increase T increases, a remains the same O T decreases, a remains the same O T dcreases, a decreases T remains the same, a increases O T remains the same, a decreases
Explanation / Answer
(a.) A straight line parallel to X axis
(b.) BothT and a remain constant.
(c.) Both T and a increases.
(d.) T remains the same a decreases .
