Consider the motion towards right as positive and motion towards left as negative.
m₁ = mass of the cart moving to right = 0.500 kg
v₁ = initial velocity before collision of the cart moving towards right = 2.2 m/s
m₂ = mass of cart moving to left = 0.800 kg
v₂ = initial velocity before collision of the cart moving towards left = - 1.1 m/s
initial momentum of the system of carts before the collision is given as
P₁ = m₁ v₁ + m₂ v₂
P₁ = (0.500) (2.2) + (0.800) (- 1.1)
P₁ = 0.22 kg m/s
P₂ = momentum of system of carts after collision
As per conservation of momentum,
Momentum of system of carts after collision = Momentum of system of carts before collision
P₂ = P₁
P₂ = 0.22 kg m/s
The answer is strong push. When you ride a bike, the pedals convert a vertical push from your legs into rotational motion for the wheels to turn.
Answer:
The capacity of doing work is called energy.
its forms are :
1. mechanical energy
2.potential energy
3. kinetics energy
4. heat energy
5. light energy
6.sound energy
7. wind energy .etc.
Should be just 2 km. - 2 km would mean it is moving in the opposite direction which come to think of it may be fine. You really can't tell.
Let 
and 
be the vectors, and let 
be their common magnitude.
The resultant 
is 
times larger in magnitude than either vector alone, so 
.
Recall the dot product identity
where 
is the angle between the vectors 
and 
. In the special case of 
, we get
Now, to get the angle between and , we have
To compute the dot product, we take the dot product of the resultant with itself.
Solve for 
.
Since their dot product is zero, and are perpendicular, so 
.
