Work, Energy, Power and Collision

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What is the definition of energy in the context of physics?

The amount of force applied to a body

The distance a body is displaced

The capacity to do work (correct)

The ability to do work at a fast pace

A force F is applied to a body, making an angle θ with the horizontal. What is the component of the force in the direction of displacement of the body?

F secθ

F cosθ (correct)

F sinθ

F tanθ

What is a necessary condition for work to be done on a body?

A force must be applied to the body

The body must be displaced through a certain distance

The force must make an angle with the horizontal

All of the above (correct)

What is the term associated with speed in the context of karate?

Power Signup and view all the answers

What is the correlation between the physical definitions of work, energy, and power and the physiological pictures they generate in our minds?

There is a loose correlation Signup and view all the answers

What is the work done by the force in displacing a body from x = 1 cm to x = 5 cm?

20 ergs Signup and view all the answers

What is the initial kinetic energy of the body?

50 J Signup and view all the answers

What is the final kinetic energy of the body when the distance covered is 5m?

10 J Signup and view all the answers

What is a characteristic of a conservative field?

Work done is independent of the path followed Signup and view all the answers

What is the unit of resistive force in the graph?

Newton Signup and view all the answers

What is the expression for kinetic energy of a body?

½ mv^2 Signup and view all the answers

What is the work done on a body when its velocity increases from 0 to v?

½ mv^2 Signup and view all the answers

What is the relation between the work done and the kinetic energy of a body?

Work done = Kinetic energy Signup and view all the answers

What is the direction of the displacement of the body when a force is applied on it?

Parallel to the direction of the force Signup and view all the answers

What is the property of kinetic energy of a body?

It is always positive Signup and view all the answers

What is the primary characteristic of a force that enables it to do work on a body?

Its ability to cause displacement Signup and view all the answers

What is the energy unit equivalent to 3.6 × 10⁶ J?

1 kWh Signup and view all the answers

What is the significance of the angle θ in the resolution of the force F into its components?

It determines the component of the force in the direction of displacement Signup and view all the answers

What is the relationship between the capacity to do work and the term 'energy'?

Energy is the capacity to do work Signup and view all the answers

What type of energy is possessed by a moving vehicle?

Kinetic energy Signup and view all the answers

What is the energy stored in a metallic wire when stretched by suspending a weight Mg?

Mgl/4 Signup and view all the answers

What is the condition under which work is said to be done on a body?

When a force applied to the body displaces it through a certain distance Signup and view all the answers

What is the association between the term 'power' and the concept of speed?

Power is associated with speed in karate Signup and view all the answers

What is the application of kinetic energy in wind mills?

Generation of electrical energy Signup and view all the answers

What is the energy possessed by a bullet fired from a gun?

Kinetic energy Signup and view all the answers

What is the type of energy released in a nuclear bomb due to mass defect?

Gamma radiation Signup and view all the answers

What is the energy unit equivalent to 1000 calories?

kcal Signup and view all the answers

What is the process in which a photon interacts with a nucleus to produce a particle-antiparticle pair?

Pair production Signup and view all the answers

What is the device that converts light energy into electrical energy?

Photoelectric cell Signup and view all the answers

What is the energy gained by a charged particle when accelerated through a potential difference of V volts?

qV Signup and view all the answers