Answer:
Explanation:
Given
mass of person is m
Distance between bridge and river is h
chord has an un-stretched length of 
Let spring constant be k
Person will just stop before hitting the river
Conserve energy i.e. Potential Energy of Person is converted in to elastic energy of chord




Thus 
Answer: True
Explanation:
A force must be applied to set a stationary object in motion.
Answer:
The average speed on the second leg of the trip is 2 m/s
Explanation:
Notice that the second leg of the trip is from 8 m in the horizontal axis heading to the left to position 4 m. So the velocity is going to be negative and given by the quotient of the change in position (-4 m) divided by the time it took: 2 seconds.
This gives: -4/ 2 m/s = -2 m/s
But the speed is going to be the absolute value of the velocity, that is:
2 m/s
Answer:
Average velocity of the particle is
Explanation:
Average velocity is defined as the total velocity divided by the total time. It is given by the equation
In the given problem the particle starts from origin, travels
and then reverses direction and travels till
within a total time of 
Displacement is defines as the shortest distance between initial and final point.
Here displacement = 
total time=
