## Question 1

Suppose an object undergoes a change in velocity from +1m/s to 4m/s. Is its velocity becoming more positive or less positive than it was before? What direction (s) is the object moving? Is the acceleration positive or negative? Explain your response. Are the velocity and acceleration in the same direction during the time interval of the change in velocity? Explain.

Hint 1

## Question 2

Suppose an object undergoes a change in velocity from –4m/s to 1m/s. Is its velocity becoming more positive or less positive than it was before? What direction (s) is the object moving? Is the acceleration positive or negative? Are the velocity and acceleration in the same direction during the time interval of the change in velocity? Explain

Hint 2

## Question 3

Suppose an object is turning around so that it undergoes a change in velocity from –2m/s to +2m/s. Is its velocity becoming more positive or less positive than it was before? What direction (s) is the object moving? Is the acceleration positive or negative? Are the velocity and acceleration in the same direction during the time interval of the change in velocity? Explain.

Hint 3

## Question 4

An object is turning around so that it undergoes a change in velocity from +1 m/s to –1m/s. Is its velocity more positive or less positive than it was before? What direction (s) is the object moving? Is it undergoing acceleration while it is turning around? Is the acceleration positive or negative? Are the velocity and acceleration in the same direction during the time interval of the change in velocity?

Hint 4

## Question 5

A ball is thrown down vertically with an initial speed of 20.5 m/s from a height of 58.8 m. What will be its speed just before it strikes the ground?

Hint 5