1. 0V0 points I Previous Answers FRKestenCP1 6.P085. My Notes A 20-g object is p
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1. 0V0 points I Previous Answers FRKestenCP1 6.P085. My Notes A 20-g object is placed against the free end of a spring (k equal to 29 N/m) that is compressed 9.3 cm (figure below). Once released, the object slides 1.25 m across the tabletop and eventually lands 1.60 m from the edge of the table on the floor, as shown. Is there friction between the object and the tabletop? If there is, what is the coefficient of kinetic friction? The sliding distance on the tabletop includes the 9.3-cm compression of the spring and the tabletop is 1.00 m above the floor level Enter an exact number 1.25 m 1.00 m 1.60 m sldes A 20-g object is placed against a spring (k 29 N/m) that has been compressed by a distance d 0.0930 m. The block is released, slides for another 1.25 m, falls off the table, and lands 1.60 m from the edge of the table. In order to determine if the table is frictionless, we can first calculate the ideal distance the object would travel past the table in the absence of friction. First, we can use conservation of mechanical energy to calculate the speed of the object when it leaves the table. Then we can use kinematics to determine the horizontal distance that the object travels. If this ideal distance is larger than 1.60 m, then the table is not frictionless. We need to calculate the change in the mechanical energy of the system and set this equal to the work done by kinetic friction in order to calculate the coefficient of kinetic friction between the object and the tabletop o the work done cct thn eBookExplanation / Answer
time taken by block to frop 1 m starting from rest.
1 = 0 + 9.8 t^2/ 2
t = 0.45 sec
v = d / t = 1.60 / 0.45 = 3.54 m/s
Applying work - energy theorem,
Work done by spring + work done by friction = change inKE
29 (0.093^2)/2 + (1.25 f) = 0.020 x 3.54^2 /2
f = 0
so there is no friction force.
uk = 0 .....Ans
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