NEET Physics Work, Energy and Power Class 11 Questions

A truck and a car moving with the same kinetic energy are brought to rest by the application of brakes which provide equal retarding forces. Which of them will come to rest in a shorter distance?

How much mass has to be converted into energy to produce electric power of 500 MW for one hour?

Identify the correct statements from the following: (A) Work done by a man in lifting a bucket out of a well by means of a rope tied to the bucket is negative. (B) Work done by gravitational force in lifting a bucket out of a well by a rope tied to the bucket is negative. (C) Work done by friction on a body sliding down an inclined plane is positive. (D) Work done by an applied force on a body moving on a rough horizontal plane with uniform velocity in zero.

When a conservative force does positive work on a body

A particle acted upon by constant forces 4î + ĵ − 3k̂ and 3î + ĵ − k̂ is displaced from the point î + 2ĵ + k̂ to point 5î + 4ĵ + k̂. The total work done by the forces in SI unit is

A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m³ in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, how much electric power is consumed by the pump? (Take g = 10 m s⁻²)

A uniform chain of length 2 m is kept on a table such that a length of 60 cm hangs freely from the edge of the table. The total mass of the chain is 4 kg. What is the work done in pulling the entire chain on the table?

What does the work-energy theorem state regarding the relationship between kinetic energy and work done?

What is the SI unit of work and energy as stated in the Work-Energy Theorem?

What type of quantity is work done, as described in the NCERT context?

What is the sign of work done by a man lifting a bucket out of a well?

What happens to the total kinetic energy in an elastic collision?

What is the formula for kinetic energy given the mass of an object and its velocity?

What is the result of the scalar product of two perpendicular vectors A and B?

What is the characteristic of the scalar product of two vectors A and B?

What is the formula for gravitational potential energy at height h?

What is the SI unit of power?

What is the work done by the road on a cyclist coming to a stop if the stopping force is 200 N and the distance is 10 m?

What does the work-energy theorem state about the relationship between the initial and final kinetic energies of an object under the influence of a force?

What type of quantity is work done by a force on a body?

In an elastic collision, what is the fractional kinetic energy gained by a moderating nucleus when a neutron collides with deuterium?

What is the relationship between the scalar product of two vectors A and B and the angle θ between them?

The dot product of two vectors A and B is a scalar quantity because it is defined as A . B = A B cos θ. What does θ represent in this context?

What does the negative sign in the expression for gravitational force indicate regarding the direction of the force?

What is the relationship between watts and joules in terms of power units?

What does the work-energy theorem state about the relationship between work done and kinetic energy?

What does the work-energy theorem state about the change in kinetic energy of a particle?

What is the nature of work done by the frictional force on a moving body?

What type of quantity is work done by forces?

What is the expression for the potential energy of a spring when it is extended or compressed by a distance x?

What is the result of the scalar product of two perpendicular vectors A and B?

What is the result of the scalar product of two perpendicular vectors A and B?

What is the formula for gravitational potential energy at height h?

What is the SI unit of power?

Which of the following statements about the Work-Energy Theorem is correct?

Which of the following statements about the Work-Energy Theorem is correct?

Which of the following statements about work done by forces is correct?

Which of the following statements about work done by forces is correct?

Which of the following statements about the scalar product of two vectors A and B is correct?

Which of the following statements about the scalar product of two vectors A and B is correct?

Which of the following statements about gravitational potential energy are correct?

Which of the following statements about the Work-Energy Theorem is correct?

Which of the following combinations correctly describes the Work-Energy Theorem?

Which of the following statements about work done by forces is correct?

Which of the following combinations of statements about work done by forces is correct?

Which of the following statements about kinetic energy in elastic collisions is correct?

Which of the following combinations about scalar products is correct?

Which of the following statements about the scalar product of vectors is correct?

Which of the following statements about power is correct?

Which of the following statements about the Work-Energy Theorem is correct?