If your speed changes from 10 km/h to 6 km/h then
you have an acceleration.
Whether it's a positive or negative one completely depends
on which direction you decided to call the positive direction,
when you started considering your speed and its changes.
If you decided to call the direction in which you're traveling
the positive direction, then a decrease in your speed is a
negative acceleration.
But you could just as easily have said that you're traveling
in the negative direction. If you did that, then a decrease in
your speed would be a positive acceleration.
It's completely up to you, and how you define things.
(t) = 2t = 1.22 sec. I believe ...
Answer:
1.137278672 m/s
+5.9 cm or -5.9 cm
Explanation:
A = Amplitude = 6.25 cm
m = Mass of object = 225 g
k = Spring constant = 74.5 N/m
Maximum speed is given by

The maximum speed of the object is 1.137278672 m/s
Velocity is at any instant is given by

The locations are +5.9 cm or -5.9 cm
C. Use a longer wrench, this is because it would create a greater turning moment as moment=force*distance
Answer: the glass are not to be covered or treated.
Explanation:
The windshield should be made with safety glass material and it must not be covered or treated with a material that will make it reflective or non-transparent.
Side windows located rear of the driver and rear windows having a material in together with glazing material that has a luminous reflectance of 35% plus or minus three per cent or less.