A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement?
A)−34 J
B)−64 J
C)−30 J
D)−94 J
E)+64 J

Question

A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement? 
A)−34 J 
B)−64 J 
C)−30 J 
D)−94 J 
E)+64 J

Quizplus · Accepted Answer

The Answer of A 3.0-kg block is dragged over a rough horizontal surface by a constant force of 16 N acting at an angle of 37° above the horizontal as shown. The speed of the block increases from 4.0 m/s to 6.0 m/s in a displacement of 5.0 m. What work was done by the friction force during this displacement? 
A)−34 J 
B)−64 J 
C)−30 J 
D)−94 J 
E)+64 J

A 30-Kg Block Is Dragged Over a Rough Horizontal Surface by by a Constant