The same heavy wooden block is dragged by a force along a rough steel plate, as shown below for two possible situations.The magnitude of the acceleration is the same for the two situations; do not assume that the magnitude of is the same.The magnitude of the frictional force in (ii), as compared with that in (i)is:
A)the same
B)greater
C)less
D)less for some angles and greater for others
E)can be less or greater, depending on the magnitude of the applied force.

Question

The same heavy wooden block is dragged by a force along a rough steel plate, as shown below for two possible situations.The magnitude of the acceleration is the same for the two situations; do not assume that the magnitude of is the same.The magnitude of the frictional force in (ii), as compared with that in (i)is: 
A)the same 
B)greater 
C)less 
D)less for some angles and greater for others 
E)can be less or greater, depending on the magnitude of the applied force.

Quizplus · Accepted Answer

The Answer of The same heavy wooden block is dragged by a force along a rough steel plate, as shown below for two possible situations.The magnitude of the acceleration is the same for the two situations; do not assume that the magnitude of is the same.The magnitude of the frictional force in (ii), as compared with that in (i)is: 
A)the same 
B)greater 
C)less 
D)less for some angles and greater for others 
E)can be less or greater, depending on the magnitude of the applied force.

The Same Heavy Wooden Block Is Dragged by a Force