Answer:
Explanation:
Given:
Elastic modulus, E = 102 GPa
Diameter, d = 3.8mm = 0.0038 m
Applied tensile load = 2440N
Maximum allowable elongation, = 0.47mm = 0.00047
Now,
The cross-sectional area of the specimen,
substituting the values in the above equation we get
or
now
the stress (σ) is given as:
and
where,
also,
where,
thus,
or on rearranging we get,
substituting the values in the above equation we get
or
or
To increase the acceleration of the car using the same engine, the mass of the car must be decreased.
<h3>
What is Newton's first law of motion</h3>
Newton's first law of motion states that an object at rest or uniform motion in a straight line will continue in that path unless acted upon by an external force.
The first law is also called the law of inertia because it depends on the mass of the object. The greater the mass, the greater the inertia and more reluctant the object will be to move.
Thus, to increase the acceleration of the car using the same engine, the mass of the car must be decreased.
a = F/m
Learn more about Newton's law here: brainly.com/question/25545050
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This kind of problems are solved by dividing total distance with the total time necessary for him to get from the start to the finish line. In this case, total distance is 10000m and the total time is the sum of the times that were given (which is 26 minutes, or 1560 seconds). Dividing these two numbers, the average speed is:
