Question

You help abuddy lift a 100 kg piano to the third floor of a house, 10 m off the ground.

How much work do you have to do? 100 J
10000 J
1000 J
10 J
50J



You push a frictionless cart and do some amount of work. The work you do when pushing the same cart twice as far while applying twice the force is
half as much.
twice as much
four times as much
the same amount.




We need to eat food to replenish our fat/energy stores. What happens if you do more work than energy you consume in food?
You lose weight
You gain weight
You can do no more work than you consume or you will instantly die.
Impossible!
You need to drink some zero calorie water.

Answer 1

1So the amount of work you have to do to lift the piano is about 98000 J.

2Therefore, the work done will be four times as much.

3 lose weight

Step-by-step explanation:

The amount of work you have to do to lift a 100 kg piano to the third floor of a house, 10 m off the ground, can be calculated using the equation for work done by a force, W = F * d * cos(Θ), where F is the force applied, d is the displacement, and Θ is the angle between the force and the displacement.

Since the piano is being lifted vertically, the angle between the force and the displacement is 0°, so cos(Θ) = 1.

The force required to lift the piano is equal to the gravitational force acting on the piano, which can be calculated as F = m * g, where m is the mass of the piano and g is the acceleration due to gravity (approximately 9.8 m/s^2).

Substituting the values:

W = F * d * cos(Θ)

W = (100 kg) * (9.8 m/s^2) * (10 m) * (1)

W = 980 N * 10 m = 98000 J

So the amount of work you have to do to lift the piano is 98000 J.

thats the first one

second one

The work you do when pushing a frictionless cart twice as far while applying twice the force is four times as much.

The amount of work done, W, can be calculated using the equation W = F * d, where F is the force applied and d is the displacement.

If you push the cart twice as far while applying twice the force, the displacement will be twice as much and the force will be twice as much, so:

W = F * d = (2 * F) * (2 * d) = 4 * (F * d)

Therefore, the work done will be four times as much.

and third one

If you do more work than the energy you consume in food, you will lose weight.

When you do work, you use energy stored in your body, such as the energy stored in fat. If you consistently use more energy than you consume through food, your body will have to draw on its energy stores to maintain your daily activities, and you will lose weight as a result.

On the other hand, if you consume more energy than you use, your body will store the excess energy as fat, leading to weight gain.

It is not possible to instantly die from doing more work than the energy you consume in food, but it is important to maintain a balanced diet and regular physical activity to maintain good health. Drinking zero calorie water will not directly affect your weight or energy stor