Answer:


Explanation:
Let the mass of the other car is "m" and its kinetic energy is

now the mass of the first car is two and half times and its kinetic energy is half that of other car
so we will have



now speed of both cars is increased by value of 9 m/s
so now we will have same kinetic energy for both cars





so speed of first car is


Answer:
<h3>The answer is 0.47 kg</h3>
Explanation:
The mass of the object given it's momentum and velocity can be found by using the formula

where
p is the momentum
v is the velocity
We have

We have the final answer as
<h3>0.47 kg</h3>
Hope this helps you
Answer:
Both are aquatic animals and are hunters
Explanation:
Pulling a dogs leash: inertia