Answer:
U2 = 47.38m/s = initial velocity of B before impact
Explanation:
An example of the diagram is shown in the attached file because of missing angle of direction in the question
Mass A, B are mass of cars
A = 1965
B =1245
U1 = initial velocity of A = 52km/hr
U2 = initial velocity of B
V = common final velocity of two cars
BU2 = (A + B)*V sin ¤ ...eq1 y plane
AU1 = (A + B) *V cos ¤ ....equ 2plane
From equ 2
V = AU1/(A + B)*cos ¤
Substitute V into equation 1
We have
U2 = (AU1/B)tan ¤ where ¤ = angle of direction which is taken to be 30°
Substitute all parameters to get
U2 = (1965/1245)*52 * tan 30°
U2 = 47.38m/s
 
        
             
        
        
        
Answer: just do the same thing, but the problems are different
Explanation: try you best
 
        
             
        
        
        
Answer:
No, there won't be a collision.
Explanation:
We will use the constant acceleration formulas to calculate,
v = u + a*t
0 = 25 + (-0.1)*t
t = 250 seconds (the time taken for the passenger train to stop)
v^2 = u^2 + 2*a*s
0 = (25)^2  + 2*(-0.1)*s
s = 3125 m (distance traveled by passenger train to stop)
If the distance traveled by freight train in 250 seconds is less than (3125-200=2925 m) than the collision will occur
Speed*time = distance
Distance = (15)*(250)
Distance = 3750 m
As the distance is way more, there won’t be a collision
 
        
             
        
        
        
A).  The apple has thermal energy, because its temperature is higher 
than absolute zero.
It also has chemical energy, because if I eat it, I get a burst of energy 
and I become ambitious for a while.
It also has gravitational potential energy, because if I drop it on my foot, 
it could bruise one of my piggies.
b).  I could increase its potential energy by lifting it higher, like over my head.
c).  As long as I'm just holding the apple, it doesn't have any kinetic energy.  
I could give it some kinetic energy by throwing it.
Or I could just drop it, and let gravity give it kinetic energy.
        
             
        
        
        
Answer:
The velocity of the ship relative to the earth V = 9.05 
Explanation:
The local ocean current is  = 1.52 m/s 
Direction  = 40°
 = 40°
Velocity component in X - direction  = 1.52
 = 1.52  °
°
 = 1.164
 = 1.164 
Velocity component in Y - direction  = 8 + 1.52
 = 8 + 1.52  °
°
 = 8.97
 = 8.97 
The velocity of the ship relative to the earth 
 
Put the values of  and
 and  we get,
 we get,
⇒ 
⇒ V = 9.05 
This is the velocity of the ship relative to the earth.