The diagram below shows the relationship between the amount of energy that is
added to a mechanical system (Ein), the amount of useful energy that is
produced by the system (Eout), and the amount of heat generated during the
mechanical process. - ANSWER *The amount of useful energy that is
produced is less than the amount of energy that was initially added to the
system.
*The system obeys the law of conservation of energy.
The _______ of a machine is the amount by which a machine multiplies the
force applied to it when accounting for energy lost due to friction. - ANSWER
actual mechanical advantage
Rick is moving a wheelbarrow full of bricks out to the curb. The bricks in the
wheelbarrow weigh more than Rick can carry, yet he can move the bricks. How
is this possible? - ANSWER When Rick lifts the handles of the wheelbarrow
most of the weight of the wheelbarrow's load goes onto its wheel.
Tracy pushes a block up an inclined plane to a height of 1.0 m. If Tracy puts
505 J of work into the system, but only 444 J are used to elevate the block, what
is the efficiency of the inclined plane? - ANSWER 88%
What does a pulley system need in order to reduce the force needed to lift an
object? - ANSWER at least one movable pulley
Greg is moving a pile of dirt across his yard using a wheelbarrow. The main
simple machines that make up the wheelbarrow are: - ANSWER a lever and a
wheel and axle.
A crowbar is an example of what type of simple machine? - ANSWER lever
Newton's cradle is a science toy that is often used to demonstrate the law of
conservation of energy.When one ball is raised, it acquires potential energy
which is then transformed into kinetic energy once the ball is released.In theory,
the total energy should be conserved such that the balls continue in perpetual
added to a mechanical system (Ein), the amount of useful energy that is
produced by the system (Eout), and the amount of heat generated during the
mechanical process. - ANSWER *The amount of useful energy that is
produced is less than the amount of energy that was initially added to the
system.
*The system obeys the law of conservation of energy.
The _______ of a machine is the amount by which a machine multiplies the
force applied to it when accounting for energy lost due to friction. - ANSWER
actual mechanical advantage
Rick is moving a wheelbarrow full of bricks out to the curb. The bricks in the
wheelbarrow weigh more than Rick can carry, yet he can move the bricks. How
is this possible? - ANSWER When Rick lifts the handles of the wheelbarrow
most of the weight of the wheelbarrow's load goes onto its wheel.
Tracy pushes a block up an inclined plane to a height of 1.0 m. If Tracy puts
505 J of work into the system, but only 444 J are used to elevate the block, what
is the efficiency of the inclined plane? - ANSWER 88%
What does a pulley system need in order to reduce the force needed to lift an
object? - ANSWER at least one movable pulley
Greg is moving a pile of dirt across his yard using a wheelbarrow. The main
simple machines that make up the wheelbarrow are: - ANSWER a lever and a
wheel and axle.
A crowbar is an example of what type of simple machine? - ANSWER lever
Newton's cradle is a science toy that is often used to demonstrate the law of
conservation of energy.When one ball is raised, it acquires potential energy
which is then transformed into kinetic energy once the ball is released.In theory,
the total energy should be conserved such that the balls continue in perpetual
