A block is pulled by a rope at constant speed along a rough level surface by a rope that makes an angle of 30 degrees with respect to the horizontal. The applied force along the rope is p The force of kinetic friction between the block and the surface is 10 N. a.Which one of the following expressions gives the magnitude of the force ?10sin 30 degree or 10cos 30degrees b. Complete the following statement: The magnitude of the normal force could be reduced by A. decreasing the angle made by the rope. B. increasing the speed of the block. C. decreasing the coefficient of kinetic friction. D. increasing the angle made by the rope. c. Which of the following actions will increase the frictional force on the block?
A block is pulled by a rope at constant speed along a rough level surface by a rope that makes an angle of 30 degrees with respect to the horizontal. The applied force along the rope is p The force of kinetic friction between the block and the surface is 10 N.
a.Which one of the following expressions gives the magnitude of the force ?10sin 30 degree or 10cos 30degrees
b. Complete the following statement: The magnitude of the normal force could be reduced by
A. decreasing the angle made by the rope.
B. increasing the speed of the block.
C. decreasing the coefficient of kinetic friction.
D. increasing the angle made by the rope.
c. Which of the following actions will increase the
A. increasing the angle made by the rope
B. increasing the weight of the block
C. decreasing the speed of the block
D. increasing the contact surface area
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