Energy

When a ball is thrown upwards, work done by gravity while the ball goes up is ______.

Which of the following is NOT required to define work scientifically?

If you push a block with $12\text{ N}$ and it moves $3\text{ m}$, how much energy is spent as work?

If displacement occurs in a direction opposite to the force, what kind of work is done?

A wooden box is pushed across a level floor in two consecutive stages as shown in the diagram. In the first stage, a force of $4\text{ N}$ is used to move the box from Point A to Point B. In the second stage, a force of $6\text{ N}$ is used to move it from Point B to Point C. What is the total work done on the box for the entire journey from A to C?

In the formula $W = F \times s$, what does the 's' strictly represent in physics?

If you push a trolley $20\text{ metres}$ using a force of $12\text{ N}$, how much energy have you transferred to the trolley (assuming no friction)?

A block of mass $2\text{ kg}$ is moved along a path starting from Point A, moving horizontally to Point B ($2\text{ m}$), and then lifted vertically to Point C ($1.5\text{ m}$). A constant force of $12\text{ N}$ is applied horizontally during segment AB. During segment BC, the block is lifted at a constant speed against gravity. What is the total work done by the applied forces to move the block from A to C? (Take $g = 10\text{ m/s}^2$)

Which of these scenarios results in the greatest work done?

If work is defined as the product of force and displacement, what is the dimension of work in terms of Mass (M), Length (L), and Time (T)?

Which of the following is equivalent to $4186$ Joules?

If an experiment results in $7,000,000$ ergs of work, how many Joules is that?

What is the result of $1 \text{ Newton} \times 1 \text{ meter}$?

The 'h' in the unit '$kWh$' represents which physical quantity?

A force of $20\text{ dynes}$ is applied over a distance of $2\text{ cm}$. The work done is:

What is the value of $1$ millijoule in terms of Joules?

Which of the following quantities is measured in Joules in the S.I. system?

In the MKS system, work is measured in Joules. What are the base units for a Joule?

An object is moved with a force of $5\text{ Newtons}$ through a distance of $20\text{ meters}$. If this energy is used to heat water, how many calories of heat are generated? (Take $1\text{ cal} = 4.2\text{ J}$)

Compare the following: $X = 10\text{ Joules}$ and $Y = 2\text{ calories}$. Which is larger? (Take $1\text{ cal} = 4.2\text{ J}$)

What is the name for energy stored in an object due to its configuration or shape?

As a roller coaster descends from a high peak, its Potential Energy:

If two balls, one weighing 5kg and one weighing 10kg, are placed on the same shelf, which one has more Potential Energy?

A marble rolling inside a bowl possesses Kinetic Energy because it is:

One Kilojoule ($1\, kJ$) is equal to:

A boy runs with a certain velocity. If he doubles his mass (by carrying a bag of equal mass) but keeps the same speed, his Kinetic Energy will:

Potential energy of an object depends on:

A stone is dropped into a well. The sound of the splash is heard after $2.5\, seconds$. Which energy form is the stone's kinetic energy converted into upon hitting the water?

If the height of a body is increased such that its potential energy increases by $300\%$, what is the new height in terms of original height $h$?

A $2\, kg$ block is pushed against a horizontal spring (spring constant $k=100\, N/m$) and compresses it by $0.1\, m$. What is the elastic potential energy stored in the spring?

When a person climbs up a ladder, they are using chemical energy from food to gain ________ energy.

A guitar string being plucked converts mechanical energy into ________ energy.

If we say a machine is 100% efficient, it means it obeys the Law of Conservation of Energy and:

When a hammer hits a nail, its mechanical energy is partly used to drive the nail and partly converted into:

In a nuclear power plant, what is the initial form of energy used to eventually produce electricity?

A person is standing at the top of a diving board. As they jump into the water, what happens to their Potential Energy ($P.E.$) and Kinetic Energy ($K.E.$)?

Identify the device that converts Mechanical Energy into Electrical Energy.

An ideal simple pendulum is displaced to one side and released. At what point in its motion is the speed of the bob greatest?

If a stone is thrown upwards, which of the following remains constant throughout its flight (ignoring air resistance)?

A satellite orbits the Earth in a perfectly circular path. Which of the following is true about its mechanical energy?