1.The net force on a box is in the positive x direction. Which of the following
ID: 2001535 • Letter: 1
Question
1.The net force on a box is in the positive x direction. Which of the following statements best describes the motion of the box?
a.Its velocity is parallel to the x axis.
b.Its acceleration is parallel to the x axis.
c.Both its velocity and its acceleration are parallel to the x axis.
d.Neither its velocity nor its acceleration need to be parallel to the x axis.Explain.
2.You are driving a car around a circular track at a constant speed as shown above.
The net force acting on your car
a.Points radially inward, toward the center of the track.
b.Points radially outward, away from the center of the track.
c.Points forward, in the same direction you are moving.
d.Points backward, opposite to the direction you are moving.
Is zero.
Explain
Explanation / Answer
1-b) Its acceleration is parallel to the x axis
The direction of acceleration is the same as that of the net force.
Because no information is given regarding any initial velocity, the velocity could be in any direction; if the initial velocity were zero, the velocity of the box would be that of the acceleration, i.e., parallel to the x axis.
2-a) Points radially inward, toward the center of the track.
there is just centripetal force acting inwards making us go in circular motion at constant speed.
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