Question

1.an object is moving up an inclined plan.Its velocity changes from 15m/s to 10m/s in two seconds.What is its acceleration?

Answer 1

u = 15 m/s
v = 10 m/s
t = 2 sec
as, v = u + at
⇒10 = 15 + 2a
⇒a = -2.5 m/s²
now, v² -u² = 2as
⇒(10)² - (15)² = 2×(-2.5)×s
⇒- 125 = - 5s
⇒s = 25 m