When they meet the 40-kg boy would have moved a distance of 6 m.
<h3>Distance moved by the 40 kg boy</h3>
Apply the principle of center mass;
Take the 40 kg mass as the reference point;
X(40 kg) = (40kg x 0 + 60kg x 10 m)/(40 kg + 60 kg)
X(40 kg) = (600)/(100)
X(40 kg) = 6 m
Thus, when they meet the 40-kg boy would have moved a distance of 6 m.
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Hello There
Answer: <span>homogeneous mixture (A)
Reason: A</span><span> homogeneous mixture seems to only have one substance, when it actually contains more. An example of one is water. It seems to only have one substance, but it contains minerals and </span><span>gases, but these are dissolved in the water.
I hope this helps
-Chris</span>
C. newtons/meter
Explanation:
The unit of spring constant K is newtons/meter.
The spring constant is also known as the stiffness.
F = k e
F is the force
k is the spring constant
e is the extension.
The unit of F is newtons
e is meters
Therefore, k becomes newtons/meter
- Stiffness is the resistance to stretch of a body.
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Answer:
The work done W = = 128.63 J
The power, p = 25.7 watts
Explanation:
Given,
The mass of the rock, m = 7.5 kg
The displacement of the rock, s = 1.75 m
The time period of work, t = 5 s
The force acting on the body,
F = m x g
= 7.5 kg x 9.8 m/s²
= 73.5 N
The work done is given by the relation,
W = F x S
Substituting the given values,
W = 73.5 x 1.75
= 128.63 J
The power is defined as the rate of doing work
P = W / t
= 128.63 / 5
= 25.7 watts
Hence, the power, p = 25.7 watts
