The correct answer is 1.2 m/s
: mv+mv=mv+mv
(0.5kg)(2m/s)+(0.4kg)(0m/s)=(0.5kg)v+(0.4kg)(1m/s)
= 1kg*m/s=(0.5kg)v+0.4kg*m/s
=1kg*m/s-0.4kg*m/s=(0.5kg)v
=0.6kg*m/s=(0.5kg)v
to solve for v we divide both side by 0.5kg
v=1.2m/s
 
        
             
        
        
        
First, illustrate the problem as shown in the attached picture. Next, let's find the distance traveled by planes A and B after 2.9 h.
Distance of A: 650 m/h * 2.9 h = 1,885 m
Distance of B: 560 m/h * 2.9 h = 1,624 m
Then, we use the cosine law to determine the distance x. The angle should be: 85 - 60.5 = 24.5°
x² = 1,885² + 1,624² - 2(1,885)(1,624)(cos 24.5°)
x = √619381.3183
<em>x = 787 m</em>
 
        
             
        
        
        
Inertia is a force which keeps stationary objects at rest and moving objects in motion at ... False - Pounds is a unit of force commonly used in the British system of ... When a chemistry student places a beaker on a balance and determines it to be ... In this case, an object moving to the right could have a balance of forces if it is ...
        
             
        
        
        
Answer:
Explanation:
Case 1: 
mass = m 
initial velocity = vo
final velocity = 0 
height = y 
Use third equation of motion 
v² = u² - 2as 
0 = vo² - 2 g y 
y = vo² / 2g       ... (1) 
Case 2: 
mass = 2m 
initial velocity = 2vo
final velocity = 0 
height = y '
Use third equation of motion 
v² = u² - 2as 
0 = 4vo² - 2 g y' 
y ' = 4vo² / 2g
y' = 4 y 
Thus, the second rock reaches the 4 times the distance traveled by the first rock. 
 
        
             
        
        
        
F = m*a 
30 N = (ma + mb) * a
30 = 5*a
a = 6 m/s ^2
F de B em A
30 - F de B,A = ma * a
30 - F de B em A = 3 * 6
30 - 18 = F de B em A
12 = F de B em A
Resposta: 6 m/s^2 e 12N
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