A 5.0 Kg object initially at rest at the origin is subjected to the time-varying force shown below. What is the object’s velocity at ?
The objects velocity is 4 m/s.
Mass of object at rest
We know that the expression for velocity is given by
and According to Newton's second law,
f= force, m= mass, a= acceleration
Substituting in we get the formula needed to find the velocity
The value can be calculated from the given graph triangular area.
(i.e.,) The area of triangle
Now by Substituting the values in the equation (), we get
The object's velocity is
The piston of a machine exerts a constant force on a ball as it moves horizontally through a distance of . You use a motion detector to measure the speed of five different balls as they come off the piston; the data are shown in the table. Use theory to find two quantities that, when graphed, should give a straight line. Then use the graph to find the size of the piston’s force.
Five balls move through the air as shown in FIGURE Q6.17 All five have the same size and shape. Air resistance is not negligible. Rank in order, from largest to smallest, the magnitudes of the accelerations aa to ae. Some may be equal. Give your answer in the form and explain your ranking.
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