A model train moves 18.3m in 122s. What is the train's average speed?
1 answer:
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Answer:
(a). The magnitude of the force is 0.38416 N.
(b). The original length is 0.0869 m.
Explanation:
Given that,
Tensile strength = 196 MPa
Maximum strain = 0.380
Diameter = 50.0 μm
Length = 12.0 cm
We need to calculate the area
Using formula of area
Put the value into the formula
We need to calculate the magnitude of the force
Using formula of force
Put the value into the formula
(b). If the length of a strand of the hair is 12.0 cm at its breaking point
We need to calculate the unstressed length
Using formula of strain
Put the value into the formula
Length after expansion is 12 cm
We need to calculate the original length
Using formula of length
Put the value into the formula
Hence, (a). The magnitude of the force is 0.38416 N.
(b). The original length is 0.0869 m.
The required energy to accelerate the golf ball is .
- Energy, which is observable in the execution of labor as well as in the form of light and heat, is the quantitative quality that is transmitted to an object or to a physical phenomenon in physics.
- Energy is a preserved resource; according to the rule of conservation of energy, energy can only be transformed from one form to another and cannot be created or destroyed.
- The joule, which is defined as "the energy transmitted to an object by the effort of moving it a length of one metre against a force of one newton," is the standard measure for power in the International System of Units (SI).
Given that,
E=
=
= .
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