When is the work done by a force on an object considered negative?

When the force is perpendicular to the displacement.

When the force is applied by a non-conservative force.

When the force is in the opposite direction to the displacement.

What is the definition of power in physics?

The force applied over a certain distance.

The total amount of energy an object has.

The rate at which work is done or energy is transferred.

The product of the force and the time over which it is applied.

The rate at which energy is transferred.

The product of the mass and the acceleration of the object.

The product of the force and the distance moved in the direction of the force.

be converted directly into mass.

change from one form to another.

be used up completely in a reaction.

increase over time in a closed system.

It depends on the mass of the box.

A negative amount, because of fatigue.

A positive amount, because force is being applied.

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01The work-energy theorem states that the net work done on an object is equal to the change in its...
02What is the SI unit of power?
03What is the SI unit for both work and energy?
04When is the work done by a force on an object considered negative?
05What is the definition of power in physics?
06A compressed or stretched spring stores what type of energy?
07Which formula correctly represents the kinetic energy (KE) of an object with mass (m) and velocity (v)?
08In physics, what is the definition of work done on an object by a constant force?
09The principle of conservation of energy states that energy cannot be created or destroyed, but can only...
10A person holds a heavy box perfectly still for 30 seconds. How much work is done on the box by the person during this time?
11If a crane does 60,000 Joules of work in 10 seconds, what is its power output?
12Gravitational potential energy depends on which three quantities?