MAF12 Quiz 2

The position of an object from  reference point P is given by s(t)=t3+3t2−9t−5 where s is in meters and t is in seconds. The object is stationary at

• t=1s

• t=2s

• t=3s

• t=4s

The position of an object from  reference point P is given by s(t)=t3−3t−2 where s is in cm and t is in seconds. The speed of the object at t=2s is

• 0cm/s

• 9cm/s

• 4cm/s

• -9cm/s

What is the slope of the normal line to the graph of  y = x3  at the point (2,8) ?

• -12

• 12

An object is known to have an acceleration of 0m/s2 at time t=2s. From this information, at t=2s the object must be:

Select one

• either stationary or travelling at constant speed

• stationary

• increasing its speed

• decreasing its speed

Consider the parabola given by the equation y = x² + 4x - 5. At which point on the graph of this parabola is the slope of the normal line equal to -0.1?

Note: point refers to x and y value. therefore answer should be in the form (x,y)

• ( 3, 16 )

• ( 1, 0 )

• ( 10, 135 )

• ( 2, 7 )