# Physics

## What is the angle between the vectors A and -A when these vectors are drawn from a common origin? A) 90° B) 0° C) 360° D) 180° E) 270°.A car travels along east and its velocity decreases. The acceleration of the car is in which of the following directions? A) Eastward B) Westward C) Northward D) Southward E) Cannot be determined without additional information.Under which of the following conditions would a car have a westward acceleration? A) As a car travels eastward with its velocity is increasing. B) As a car travels eastward with its velocity is decreasing. C) As a car travels westward with its velocity is decreasing. D) As a car travels westward with its velocity is constant. E) As a car travels eastward with its velocity is constant.A car travels along eastward with a constant velocity. The magnitude of the acceleration of the car is A) decreasing. B) increasing. C) non-zero constant. D) zero. E) None of the other choices is correct.If the acceleration vector of an object is directed parallel to the velocity vector, then A) the object is speeding up. B) the object is slowing down. C) the object is moving with a constant velocity. D) the object is turning. E) the object is at rest.

What is the angle between the vectors A and -A when these vectors are drawn from a common origin?A) 90°B) 0°C) 360°D) 180°E) 270° A car travels along east and its velocity decreases. The acceleration of the car is in which of the following directions?A) EastwardB) WestwardC) NorthwardD) SouthwardE) Cannot be determined without additional information …

## If the velocity versus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. E) none of the above.The area under a curve in a velocity versus time graph gives A) distance traveled. B) displacement. C) speed. D) velocity. E) acceleration.A car moving initially with velocity v0 with deceleration a comes to a full stop after traveling a distance d. We can say that the velocity of the car after traveling a distance d/2 is A) greater than v0/2. B) equal than v0/2. C) smaller than v0/2. D) has no relationship to v0.A car traveling with velocity v is decelerated by a constant acceleration of magnitude a. It travels a distance d before coming to rest. If its initial velocity were doubled, the distance required to stop would A) double as well. B) decrease by a factor of two. C) stay the same. D) quadruple. E) decrease by a factor of four.

If the velocity versus time graph of an object is a straight line making an angle of 30 degrees with the time axis, the object isA) moving with constant non-zero speed.B) moving with constant non-zero acceleration.C) at rest.D) moving with infinite speed.E) none of the above. The area under a curve in a velocity versus …

## An object is moving with constant non-zero acceleration in the +x-axis. The position versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.An object is moving with constant non-zero velocity in the +x-axis. The velocity versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.An object is moving with constant non-zero acceleration in the +x-axis. The velocity versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.If the position versus time graph of an object is a horizontal line, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. E) none of the above.If the velocity versus time graph of an object is a horizontal line, the object is A) moving with constant non-zero speed. B) moving with constant non-zero acceleration. C) at rest. D) moving with infinite speed. E) none of the above

An object is moving with constant non-zero acceleration in the +x-axis. The position versus time graph of this object isA) a horizontal straight line.B) a vertical straight line.C) a straight line making an angle with the time axis.D) a parabolic curve.E) a hyperbolic curve. An object is moving with constant non-zero velocity in the +x-axis. …

## The motion of a particle is described in the velocity vs. time graph shown in Figure 2-1. We can say that its speed A) increases. B) decreases. C) increases and then decreases. D) decreases and then increases. E) remains constant.Suppose that a car traveling to the East (+x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. A) The car is decelerating, and its acceleration is positive. B) The car is decelerating, and its acceleration is negative. C) The acceleration is zero. D) A statement cannot be made using the information given.An object is moving with constant non-zero velocity in the +x-axis. Suppose that a car traveling to the West (-x direction) begins to slow down as it approaches a traffic light. Make a statement concerning its acceleration. A) The car is decelerating, and its acceleration is positive. B) The car is decelerating, and its acceleration is negative. C) The acceleration is zero. D) A statement cannot be made using the information givenThe position versus time graph of this object is A) a horizontal straight line. B) a vertical straight line. C) a straight line making an angle with the time axis. D) a parabolic curve. E) a hyperbolic curve.

The motion of a particle is described in the velocity vs. time graph shown in Figure 2-1. We can say that its speedA) increases.B) decreases.C) increases and then decreases.D) decreases and then increases.E) remains constant. Suppose that a car traveling to the East (+x direction) begins to slow down as it approaches a traffic light. …