1st 9wks Physics Exam

The value for gravitational acceleration is

• 8.9 m/s²

• 98.1 m/s²

• 9.8 m/s²

• 9.8 m/s

Free Fall is a state where ________ is the only force acting on an object.

The slope of the line in a position-time graph indicates the ______________ of an object.

Which of the following are vectors? Select all that apply.

• 23 m/s North

• 1.5 m/s² up

• 45 minutes

• 2,375 m

Using the equation, Vf = Vi + a $\Delta$  t, if an object has been falling for 6 seconds how fast is it going in m/s?

• 58.8 mi/hr

• 58.8 m/s

• 70 m/s

• 48 m/s

________________ is the change in velocity measured over a time interval.

If Vf = 4m/s, Vi = 0m/s, Tf=3 s and Ti = o s, what is the average acceleration?

• 0.75 s

• 12 s

• 1.3 s

• 13 s

What does a Free Body Diagram tell us about an object? Choose all correct answers.

• how heavy it is.

• What forces are acting on it.

• The relative strength of the forces.

• What it's made of.

The formula for calculating displacement is ________?

The definition of displacement is

• How far you've travelled from your starting point.

• How far you are from your starting point.

• How long you've been travelling.

• The compass bearing you're at relative to your starting point.