Questions

1.

Which figure represents the position vs time graph of an object moving with constant velocity along the negative x-axis?

(a)

Straight line sloped up to the right

(b)

Straight line slope up to the left

(c)

Horizontal straight line

(d)

vertical straight line

(e)

Parabola

2.

Which of the following quantities are vectors (i.e. have magnitude and direction)?

(a)

relative position, speed and acceleration

(b)

relative position, velocity and acceleration

(c)

speed and acceleration

(d)

none of the above

3.

Consider an object falling freely towards the earth

(a)

Its acceleration is constantly increasing.

(b)

Its average speed is always greater than its instantaneous speed.

(c)

Its average speed is always less then its instantaneous speed.

(d)

Its acceleration is constantly decreasing.

(e)

None of the above are correct.