Physics 221
posted by Joshua .
1. throughout a time interval, while the speed of a particle increases as it moves along the x axis, its velocity and acceleration might be:
A. positive and negative, respectively
B. negative and positive, respectively
C. negativa and negative, respectively
D. negative and zero, respectively
E. positive and zero, respectively
2. An object is thrown vertically upward. While it is rising:
A. its velocity and acceleration are both upward
B. its velocity is upward and its acceleration is downward
C. its velocity and acceleration are both downward
D. its velocity is downward and its acceleration is upward
E. its velocity and acceleration are both decreasing

on the first, the direction of travel is not specified, so it could be either.
On the second, gravity is always acting downward, is it not? 
1 = A
Respond to this Question
Similar Questions

PHYSICS I NEED MAJOR HELP PLEEEAAAAAASSSSSSSSSEEEE
If velocity is positive and increasing then... displacement is.... acceleration is.... If displacement is positive and increasing then...... acceleration is...... velocity is..... If acceleration is positive and increasing then......... … 
Calc
a partial moves along the xaxis so that its velocity at time t, for 0< = t = < 6, is given by a differentiable function v whose graph is shown above. The velocity is 0 at t=0, t=5, and the graph has horizontal tangents at t=4. … 
help math
a partial moves along the xaxis so that its velocity at time t, for 0< = t = < 6, is given by a differentiable function v whose graph is shown above. The velocity is 0 at t=0, t=5, and the graph has horizontal tangents at t=4. … 
Physics
If an object travels with positive velocity in the xdirection, can it have a negative acceleration along the xaxis at the same time? 
Physics
A particle is initially moving along the positive xaxis at a speed of 9.90 m/s. After 2.40 s, the particle is moving along the negative yaxis at a speed of 4.71 m/s. Find the x and y components of the particle's acceleration. 
phsics
throughout a time interval, while the speed of a particle increases as it moves along the xaxis, its velocity and acceleration might be: a) positive and negative B) negative and negative c) negative and positive D) negative and zero … 
Physics
A particle starts from the origin at t = 0 and moves along the positive x axis. A graph of the velocity of the particle as a function of the time is shown in the figure; the vaxis scale is set by vs = 7.0 m/s. (a) What is the coordinate … 
physics..
This seems easy and yet i'm skeptical if these are actually supposed to be difficult.. It asks for a lot. It's seems repetitive.. 1. a falling stone takes .30 seconds to travel past a window 2.2m tall. From what height above the top … 
Math
We are adding positive and negative numbers. The question is State positive or negative or it depends along with my answers. Are these correct? 
Physics
1. Which statement below is true? a. If a car is traveling eastward, its acceleration is eastward. b. If a car's speed is decreasing, its acceleration must be negative. c. If a particle is moving, it must have a nonzero acceleration.