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Is work done if you lift a brick?
Yes, work is done when you lift a brick against gravity because you are exerting a force over a distance in the direction of the force of gravity. Work is defined as force multiplied by distance in the direction of the force, so lifting the brick requires work to be done.
How is a brick painlessly broken over your hand by slamming the brick with a hammer?
To break a brick painlessly over your hand by slamming it with a hammer, hold the brick securely on a stable surface with your hand underneath. Then, swiftly and firmly strike the center of the brick with the hammer. The force of the impact should break the brick cleanly in half without harming your hand.
How does an incline plane reduce amount of input force needed?
by increasing distance over which the force is applied
What is the work done on the 10N of brick when it is pushed by a 70N of horizontal force over a distance of 10m?
The work done on the brick is 700 J. Work is calculated as force multiplied by distance, so 70 N * 10 m = 700 J.
How an pulley and incline plane change the amount of force needed to move an object?
A pulley can reduce the amount of force needed to move an object by distributing the force over multiple ropes and pulleys, effectively trading force for distance. An inclined plane can reduce the force needed to move an object by allowing it to be raised to a higher elevation with less force over a longer distance.
Is work done if you lift a brick?
Yes, work is done when you lift a brick against gravity because you are exerting a force over a distance in the direction of the force of gravity. Work is defined as force multiplied by distance in the direction of the force, so lifting the brick requires work to be done.
How is a brick painlessly broken over your hand by slamming the brick with a hammer?
To break a brick painlessly over your hand by slamming it with a hammer, hold the brick securely on a stable surface with your hand underneath. Then, swiftly and firmly strike the center of the brick with the hammer. The force of the impact should break the brick cleanly in half without harming your hand.
How does an incline plane reduce amount of input force needed?
by increasing distance over which the force is applied
How much mechanical work is done in holding the brick 1m above the floor?
The mechanical work done in holding a brick 1 meter above the floor is zero, as work is defined as the force applied over a distance. While you exert an upward force equal to the weight of the brick to keep it suspended, there is no displacement in the direction of the force since you are not moving the brick. Thus, even though you are applying force, the lack of movement means no mechanical work is done.
Is the pressure exerted by a brick on its side or end more or less?
It is if a brick rests on a table the force with which the brick pushes on the table is its weight. The pressure it exerts on the contact area depends on the brick's orientation. If the contact area between brick and table is larger, the brick exerts less pressure on the contact area.
What is the work done on the 10N of brick when it is pushed by a 70N of horizontal force over a distance of 10m?
The work done on the brick is 700 J. Work is calculated as force multiplied by distance, so 70 N * 10 m = 700 J.
How an pulley and incline plane change the amount of force needed to move an object?
A pulley can reduce the amount of force needed to move an object by distributing the force over multiple ropes and pulleys, effectively trading force for distance. An inclined plane can reduce the force needed to move an object by allowing it to be raised to a higher elevation with less force over a longer distance.
How does an inclined plane reduces the amount of force needed to move an object?
An inclined plane reduces the amount of force needed to move an object by increasing the distance over which the force is applied, which decreases the force required. This is because the force needed to lift an object vertically is greater than the force needed to push it along an inclined plane.
Why does a brick painlessly brake over the hand of a physics teacher by slamming it with a hammer?
The force applied by a hammer is focused on a small area, creating enough pressure to break the brick without causing harm to the hand underneath. This is due to the distribution of force over a smaller surface area, minimizing the impact on the teacher's hand.
Why is it easy to push a brick gently but gets hurt when kick it?
Inertia. It takes force to overcome the brick's weight and friction. If applied slowly, the work can be done with deforming your foot. Done quickly, and the fleshy part of your foot will be squashed, before the brick starts to move.
How do wedges reduce the amount of force needed to do work?
Wedges reduce the amount of force needed to do work by increasing the distance over which the force is applied. This allows for the same amount of work to be done with less force. The shape of the wedge allows for the force to be spread out over a larger area, making it easier to split or separate objects.
Is energy needed for force?
Energy is not needed for force itself, as force is simply a push or pull acting upon an object. However, energy is required to apply a force over a distance, which is termed work. Work involves transferring energy to an object to exert a force on it.
