Maggie participated in a race. She ran 100 meters west and then turned back and ran to the starting line to complete the race. M
1 answer:
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<h2>Answer:2.65 seconds</h2>
Explanation:
Let be the acceleration.
Let be the initial velocity.
Let be the final velocity.
Let be the time taken.
As we know from the equations of motion,
Given,
By looking at the acceleration of the object.
In fact, Netwon's second law states that the resultant of the forces acting on an object is equal to the product between the mass m of the object and its acceleration:
So, when static friction is acting on the object, if the object is still not moving we know that all the forces are balanced: in fact, since the object is stationary, its acceleration is zero, and so the resultant of the forces (left term in the formula) must be zero as well (i.e. the forces are balanced).
In fact, Netwon's second law states that the resultant of the forces acting on an object is equal to the product between the mass m of the object and its acceleration:
So, when static friction is acting on the object, if the object is still not moving we know that all the forces are balanced: in fact, since the object is stationary, its acceleration is zero, and so the resultant of the forces (left term in the formula) must be zero as well (i.e. the forces are balanced).