10 mph i jus got it right on the test
Answer:
Explanation:before the phase change the substance is a particle.
Answer:v
Explanation:
Given
Initially spring mass system is moving towards right with velocity 
Now if the spring is released left block moves towards left with a velocity 
As there is no external force applied on the system therefore the change in linear momentum is zero i.e. it is conserved
so center of mass continue to move towards the right with velocity v or we can say right block moves towards right with velocity
and left block moves with velocity 
Speed of the black Mamba = 18 km/h = 5m/s
now the distance that black mamba cover to catch prey


Now it returns to its hide in 12 s
so average speed of return is given as

Part b)
For the whole trip we know that displacement of the mamba is zero
so average velocity of whole trip will be zero
Part c)
For average speed we know that total distance of the black mamba
d = 12.5 + 12.5 = 25 m
total time taken = 2.5 + 12 = 14.5 s
now average speed is given as

