# Acceleration. Recall:  Acceleration is the rate at which velocity increases or decreases  If an object is accelerating is not experiencing uniform motion.

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Acceleration

Recall:  Acceleration is the rate at which velocity increases or decreases  If an object is accelerating is not experiencing uniform motion

Formulas:  To solve acceleration questions use: Can use if acceleration is uniform

 Note: Your textbook goes through sample problems on pg 220/221 in a step- by-step method.

A car acquires a velocity of 32m/s by accelerating at 4.0m/s 2 for 5s. What was its initial velocity? v 2 = 32m/s a = 4m/s 2 t = 5s v 1 = ?

v 1 = 30m/s t = 3s v 2 = 0m/s d = ? The brakes are applied on a car traveling at 30m/s. The car stops is 3s. What is the car’s displacement & average acceleration? a = ?

How long does it take an airplane accelerating from rest at 5.0m/s 2 to travel a distance of 360m? a = 5m/s 2 v 1 = 0m/s d = 360m t = ?

A ball rolls at an initial velocity of 4m/s up a hill. Five seconds later it is rolling down the hill at 6.0m/s. What is the acceleration? v 1 = 4m/s t = 5s v 2 =–6m/s a = ?

A person biking at a velocity of 10m/s speeds up for a distance of 24m, accelerating at a rate of 3m/s 2. What is the bike’s final velocity? v 1 = 10m/s d = 24m a = 3m/s 2 v 2 = ?

How long does it take a car traveling at 22m/s accelerating at 4.0m/s 2 to travel a distance of 20m? v 1 = 22m/s a = 4m/s 2 d = 20m t = ?

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