Formula Review for Chapter 12 (Forces & Newton's Laws)  With Solutions 

pg 
Formula 
Units 
Word Problem 
Solution 
401 
F = m * a 
Newton 
1) What is the net force needed to accelerate a 1.5 x 10^{3} kg automobile forward at 2.2 m/s/s? 

401 
F = m * a 
Newton 
2) A baseball that has a mass of 0.16kg accelerates downwards at 9.8 m/s/s. What is the gravitational force acting upon the baseball? 

401 
F = m * a 
Newton 
3) A 3.8kg model airplane accelerates at 2.1 m/s/s. What is the net force acting on the airplane? 

415 
P = m * v 
kgm/s 
4) Calculate the momentum of a 85 kg speed skater moving forward at 15m/s 

415 
P = m * v 
kgm/s 
5) Calculate the momentum of a 125 kg ostrich running north at 14.2 m/s. 

R 
D 
m/s 
6) A ball rolls down a 4m ramp in 3 s. What is its average velocity? 

R 
FVOV A=  T 
km/hr/s 
7) A rocket slows down from 7100 km/hr to 2250 km/hr in 9 seconds. What is its average acceleration? 