Question Bank
इस अध्याय में कार्य, ऊर्जा और शक्ति के महत्वपूर्ण सिद्धांतों का अध्ययन किया जाएगा, जो हमारे आस-पास के प्राकृतिक घटनाओं को समझने में मदद करते हैं। यह जीवन के लिए ऊर्जा के महत्व को समझाता है।
What is the formula for kinetic energy?
If a 1 kg object is moving at 2 m/s, what is its kinetic energy?
A machine does 500 J of work in 10 seconds. What is its power?
What is potential energy dependent on?
An object of mass 10 kg is lifted to a height of 5 m. What is its potential energy? (g = 10 m/s²)
Which of the following statements about work is true?
What is the work done by gravity on a satellite in a stable orbit?
If the kinetic energy of an object is 50 J and its mass is 10 kg, what is its velocity?
How much work is done when a force of 20 N moves an object 5 m in the direction of the force?
What happens to kinetic energy if the speed of a moving object is doubled?
Which of these is an example of potential energy?
In a closed system, according to the law of conservation of energy, what remains constant?
An electric heater consumes 1500 W for 2 hours. How much energy does it use in joules?
What is the total mechanical energy of an object at rest?
If a person does 200 J of work lifting a box up 4 m, what is the weight of the box?
When is work done on an object?
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