Name______

Acceleration BookWork Section 2-2 (odds academic, all honors.. check book for answers!)

D=Vavg*T Vavg= (Vi+Vf)/2 A= (Vf-Vi)/T

**New formulas from other definitions:**

**D= Vi*T + ½ *A*T**^{2}** and Vf**^{2}** = Vi**^{2}**
+ 2*A*D**

** **

Pg 55

1) A car with an intial speed of 23.7 km/hr accelerates at a
uniform rate of 0.92 m/s^{2}**
**for 3.6 sec. Find the final speed and
displacement of the car during this time.

2) An automobile with an initial speed of 4.30 m/s
accelerates at the rate of 3 m/s^{2}**
**. Find the final speed and displacement
after 5 seconds.

3) A car starts from rest and travels for 5 seconds with a uniform acceleration of

– 1.5 m/s^{2}** **. What is the final velocity of the car.? How far
does the car travel in this time interval?

4) A driver of a car traveling at -15 m/s applies the
brakes, causing a uniform acceleration of +2 m/s^{2}**
**. If the brakes are applied for 2.5
seconds what is the velocity of the car at the end of the braking period? How
far has the car moved during the braking period?

Name______

Acceleration BookWork Section 2-2 (odds academic, all honors.. check book for answers!)

D=Vavg*T Vavg= (Vi+Vf)/2 A= (Vf-Vi)/T

**New formulas from other definitions:**

**D= Vi*T + ½ *A*T**^{2}** and Vf**^{2}** = Vi**^{2}**
+ 2*A*D**

** **

Pg 58

1) Find the velocity after the stroller (from page before) has traveled 6.32 m.

(A= .5 m/s^{2}**
**, Vi=0 )

2. A car traveling initially at +7.0 m/s accelerates at the
rate of +0.80 m/s^{2}** **for a distance of 245 m.

a) What is its velocity at the end of the acceleration?

b) What is its velocity after it accelerates for 125 m?

c) What is its velocity after it accelerates for 67 m?

3. A gull soaring in a straight line with an initial
velocity of -32 m/s accelerates at a rate of +3.0 m/s^{2}** **for 9 seconds. What is the gull’s velocity at the end of
the acceleration?

4. An aircraft
has a liftoff speed of 120 km/hr.

a)
What minimum constant acceleration does
this require if the aircraft is to be airborne after a take off run of
240 m?

b)
How long does it take the aircraft to become airborne?

5. A car accelerates in a straight line from rest at the
rate of 2.3 m/s^{2}** **.

When
the car goes 55 m, what is the final velocity?

What is the time it takes to do this?