Answer:
A) Frictional force on the surface of the table
B) 90°
Explanation:
Author:
chanelhowe
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6Answer:
(a) The nature of the work done by (i) muscular force is positive (ii) frictional force is negative (iii) gravitational force is zero. (b) The angle between frictional force and displacement of the toy car is [tex]180\textdegree[/tex].
Explanation:
Solution part (a):
(i) The nature of work done by the girl's muscular force is positive as both the displacement and force are towards the right side.
(ii) The nature of work done by the frictional force is negative as the displacement is towards the right and the frictional force is towards the left.
(iii) The nature of work done by the Earth's gravitational force is zero as the displacement is towards the right and the Earth's gravitational force is downwards perpendicular to the displacement.
Solution part (b):
The displacement of the toy's car is towards the right and the frictional force is towards the left so, the angle between frictional force and displacement of the toy car is [tex]180\textdegree[/tex].
Author:
conductorfutp
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