Podcast
Questions and Answers
What is the relationship between work done and the change in kinetic energy of an object?
What is the relationship between work done and the change in kinetic energy of an object?
- They are equal (correct)
- Work done is greater than the change in kinetic energy
- They are inversely proportional
- There is no relationship between them
If an object of mass 15 kg is moving with a uniform velocity of 4 m/s, what is its kinetic energy?
If an object of mass 15 kg is moving with a uniform velocity of 4 m/s, what is its kinetic energy?
- 60 J
- 40 J (correct)
- 16 J
- 30 J
When the velocity of an object is doubled, what happens to its kinetic energy?
When the velocity of an object is doubled, what happens to its kinetic energy?
- Halves
- Doubles
- Quadruples (correct)
- Remains the same
What is the kinetic energy possessed by an object of mass 1500 kg moving at a velocity of 50/3 m/s?
What is the kinetic energy possessed by an object of mass 1500 kg moving at a velocity of 50/3 m/s?
When the velocity of an object is increased three times, what happens to its kinetic energy?
When the velocity of an object is increased three times, what happens to its kinetic energy?
What happens to a rubber band when stretched and then released?
What happens to a rubber band when stretched and then released?
What type of energy is transferred to an object when a rubber band is stretched?
What type of energy is transferred to an object when a rubber band is stretched?
When winding the key of a toy car, the energy transferred to the spring inside is stored as:
When winding the key of a toy car, the energy transferred to the spring inside is stored as:
What kind of energy is possessed by an object due to its position or configuration?
What kind of energy is possessed by an object due to its position or configuration?
If you lift an object to a greater height, what happens to the amount of work it can do?
If you lift an object to a greater height, what happens to the amount of work it can do?
What happens when a stretched rubber band is released?
What happens when a stretched rubber band is released?
In the scenario with the slinky, would the slinky acquire potential energy if compressed instead of stretched?
In the scenario with the slinky, would the slinky acquire potential energy if compressed instead of stretched?
What is the unit of work when a force of 1 N displaces an object by 1 m along the line of action of the force?
What is the unit of work when a force of 1 N displaces an object by 1 m along the line of action of the force?
When the force on an object is zero, what is the work done?
When the force on an object is zero, what is the work done?
If an object is displaced by 0 m, what would be the work done?
If an object is displaced by 0 m, what would be the work done?
In which scenario is work done negative according to the explanation provided?
In which scenario is work done negative according to the explanation provided?
What is the work done by a force of 7 N on an object displaced by 8 m in the direction of the force?
What is the work done by a force of 7 N on an object displaced by 8 m in the direction of the force?
In lifting an object upwards, which force does positive work according to the example?
In lifting an object upwards, which force does positive work according to the example?
Which of the following is a correct definition of power?
Which of the following is a correct definition of power?
If an agent does a work W in time t, how is power calculated?
If an agent does a work W in time t, how is power calculated?
What is the basis for classifying machines like motorbikes and motorcars?
What is the basis for classifying machines like motorbikes and motorcars?
If two children of the same weight climb up a rope separately and reach a height of 8m, what are they primarily demonstrating?
If two children of the same weight climb up a rope separately and reach a height of 8m, what are they primarily demonstrating?
Why is it important for nature to allow the transformation of energy?
Why is it important for nature to allow the transformation of energy?
How is power defined in the context of agents transferring energy?
How is power defined in the context of agents transferring energy?
What is the formula to calculate power in physics?
What is the formula to calculate power in physics?
What is the SI unit of power?
What is the SI unit of power?
If a lamp consumes 500 J of energy in 5 s, what is its power?
If a lamp consumes 500 J of energy in 5 s, what is its power?
What is the definition of average power?
What is the definition of average power?
Which formula can be used to calculate power when weight and height are given?
Which formula can be used to calculate power when weight and height are given?
What is work done on an object defined as?
What is work done on an object defined as?
