An object moves back and forth, as shown in the position-time graph below. Which
ID: 1409261 • Letter: A
Question
An object moves back and forth, as shown in the position-time graph below.
Which of the following statements are correct/incorrect?
correct incorrect At point 7 the velocity is positive.
correct incorrect At point 4 the object is at the origin.
correct incorrect At point 1 and 3 the object is on the positive side of the origin.
correct incorrect At point 2 the object is on the positive side of the origin.
correct incorrect At points 2 and 5 the object is the same distance from the origin.
correct incorrect The velocity is zero at point 4.
correct incorrect At points 1 and 3 the velocities are about the same.
correct incorrect At point 3 the velocity is negative.
correct incorrect At point 7 the velocity is negative.
correct incorrect At point 8 the object is farther from the origin than any other numbered point.
correct incorrect At point 5 the velocity is positive.
correct incorrect At points 1 and 7 the velocities are about the same.
8 7 6 5 4 3 2 1 0 +0 uolisodExplanation / Answer
The answer is given in the following format:
(the number of the statement).- Explanation. (If the statment is correct or incorrect)
s1.- At the point 7 the object is moving toward +d, therefore the velocity is positive. Satement correct
s2.- At the point 4 The object is at position 0, then is at the origin. Satement correct
s3.- The points 1 and 3 are between 0 and +d, then they are in the positive side. Satement correct
s4.- At the point 2 the object is in +d, is in the positive side. Satement correct
s5.- At the point 5 the object is in the negative side of the origin. Satement incorrect
s6.- The velocity is only zero when the object is at +d or -d, since 4 is not at +d or -d the velocity on it is not zero. Satement incorrect
s7.- The velocity at 1 is positive and in 3 is negative. Satement incorrect
s8.- As we say s7. Satement correct
s9.- As we say in s1. Satement incorrect
s10.- At the point 8 the object is at the origin, like 4. Satement incorrect
s11 At the point 5 the object is moving toward -d, therefore the velocity is negative. Satement incorrect
s12 For this statament the iformation given is not enough to say if the velocites of 1 and 7 are the same