Answer:
The momenta of each child cannot be compared.
Explanation:
The expression of the momentum is as follows;
p=mv
Here, p is the momentum, m is the mass of the object and v is the velocity of the object.
It is given in the problem that the given system consists of two children.
Playing in the rain, a little girl tackles a little boy. Just before she tackles him, the boy is running east at 3 m/s and the girl is running south at 4 m/s. After the tackle, the girl holds on and the two slide on the wet grass. Only the velocities of the children are given.
The total momentum of the given system lies between the south of the east. The momenta of each child cannot be calculated as the mass of the children is not given in the given problem. If the masses of the children are the same then the momenta of each child are equal.
The given system has non zero momentum before and after the collision. Then, The conservation of momentum violates here.
Therefore, the momenta of each child cannot be compared.
Answer:
<h2>4.6 m/s²</h2>
Explanation:
The acceleration of an object given it's velocity and time taken can be found by using the formula
<h3>
</h3>
where
v is the final velocity
u is the initial velocity
t is the time taken
a is the acceleration
Since the body is from rest u = 0
From the question we have
We have the final answer as
<h3>4.6 m/s²</h3>
Hope this helps you
Answer:
Explanation:
Given
-- mass of tub
Required
Determine the amount of power needed
Power is calculated as thus:
Substitute values for Energy and Time
Divide by 1000 to convert to kW (kilowatt)
Answer:
a. 140 N/cm
Explanation:
The relationship between force applied, spring constant and compression/stretching of a spring is
where
F is the force applied
k is the spring constant
x is the compression/stretching
In this problem, we have:
x = 0.250 m is the compression
F = 35 N is the force applied
Substituting and re-arranging the equation, we find the spring constant: