7 Questions
When a body is moved on a rough horizontal plane with uniform velocity, the work done by friction is?
Zero
The work done by gravitational force when a man lifts a bucket out of a well is?
Negative
The work done by an applied force on a body moving on a rough horizontal plane with uniform velocity is?
Zero
When a man lifts a bucket out of a well by means of a rope tied to the bucket, the work done by the man is?
Positive
In the case of a body sliding down an inclined plane, the work done by friction is?
Negative
Why is the blood pressure greater at the feet than at the brain in humans?
The pressure in human vessels is directly proportional to the height of the blood column, which is greater at the feet than at the brain.
Why does the atmospheric pressure at the height of about 6km decrease to nearly half of its value at sea level?
The air at 6km height is compressed by the total mass above it, reducing the atmospheric pressure.
Test your understanding of work, energy, and power with this NCERT Class 11 Physics Chapter 6 quiz. Determine the sign of work done in different scenarios and enhance your knowledge of the fundamental concepts in physics.
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