When analyzing inelastic collisions, we need to consider the law of conservation of momentum, which states that the total momentum, p, of the closed system is a constant. In the case of inelastic collisions, the momentum of the combined mass after the collision is equal to the sum of the momentum of each of the initial masses.
p1+p2+...=pf
In our case we only have two masses, which makes our problem fairly simple. Lets plug in the formula for momentum; p=mv.
m1v1+m2v2=(m1+m2)vf
To find the velocity of the combined mass we simply rearrange the terms.
vf=m1v1+m2v2m1+m2
Plug in the values given in the problem.
vf=(3.0kg)(1.4m/s)+(2.0kg)(0m/s)03.0kg+2.0kg
vf=.84m/s
Answer:
Explanation:
First of all, let's calculate the energy of a single photon of wavelength
which is given by
The power of the flash is
and the time it lasts is
so the total energy delivered in one flash is
This energy contains exactly N photons each of energy 
, so the number of photons emitted in one flash is
Very good question, The answer you might be looking for is 7.467m/s^2.
Have a blessed day God bless.
Answer:
B. 
.
Explanation:
The vehicle is travelling eastwards when its velocity is positive and westwards when velocity is negative. According to the graph, 
for . Hence, correct answer is B.
