ACCELERATION

Is generally defined as the time rate of change of

velocity

In EQUATION:

if

if

tt

vv

t

va

PROBLEM SOLVING: Show your solution.1. A bus can go from

rest to 90 km/h in 10 s. What is its

acceleration?

if

if

tt

vv

t

va

Given: vi = 0 ti = 0 vf = 90 km/h tf = 10 s

Find: a = ?

Solution:

010

0/90

s

hkm

t

va

s

hkma

10

/90

s

hkma

/9 or a = 9 km/h/s

2. In a motorcycle’s speedometer registers 60km/h, suddenly it stop after 5 s. What is its acceleration?

Given: vi = 60 km/h ti = 0 vf = 0 tf = 5 s

Find: a = ?

if

if

tt

vv

t

va

Solution:

05

/600

s

hkm

t

va

s

hkma

5

/60

s

hkma

/12 or a = -12 km/h/s

3. What is the acceleration of an airplane that maintains a constant velocity of 300 km/h for

10 s? How about for 1h? How about if it already landed? Defend your answer.

Given: vi = 300 km/h

ti = 0 vf = 300 km/h tf = 10 s

Find: a = ?

if

if

tt

vv

t

va

Solution:

010

/300/300

s

hkmhkm

t

va

s

hkma

10

/0

a = 0

Seniors

BY: ikeivanangelo iq7