Whats force is pushing upwards on your body while you are standing?
The force pushing upwards on your body while you are standing is the force of gravity. Despite the sensation of being pushed upwards, your body is actually being pulled downwards towards the center of the Earth by the force of gravity. However, the ground or floor beneath your feet exerts an equal and opposite force known as the normal force, which pushes upwards against gravity to support your body weight and keep you in place. This normal force is what you perceive as the force pushing upwards on your body while standing.
what is the name of the force that is pulling down on our bodies ?
The force pulling down on our bodies is known as the force of gravity. Gravity is a fundamental force of nature that attracts objects with mass towards each other. On Earth, the force of gravity is responsible for keeping our feet on the ground and pulling objects towards the center of the Earth.
What is the force of the upward force compared with the pulling force? How do you know ?
The upward force (known as the normal force) is equal in magnitude and opposite in direction to the downward force of gravity. This is based on Newton's third law of motion, which states that for every action, there is an equal and opposite reaction.
When you are standing on the ground, the normal force exerted by the ground on your body counters the force of gravity pulling you downwards. The normal force and the force of gravity are balanced, resulting in a net force of zero (according to Newton's first law of motion). This balance allows you to remain in static equilibrium and maintain your standing position.
Can you guess how much force is required to do the following:
Lift a 1 kg bag of sugar
Hold your weight when sitting in a chair
Launch a space shuttle
Sure! Here are some rough estimates:
1. Lift a 1 kg bag of sugar: The force required to lift an object against gravity is equal to its weight. On Earth, the weight of an object can be calculated using the equation:
Weight = mass * acceleration due to gravity
Weight = 1 kg * 9.8 m/s^2 (approximately)
Weight = 9.8 Newtons (approximately)
2. Hold your weight when sitting in a chair: When you are sitting in a chair, the force required to hold your weight is the same as your weight. Assuming an average weight of 70 kg, the force required would be approximately 70 kg * 9.8 m/s^2 = 686 Newtons.
3. Launch a space shuttle: Launching a space shuttle requires an enormous amount of force due to the mass of the shuttle and the acceleration required to overcome Earth's gravity. The exact force required depends on many factors such as the mass of the shuttle, desired acceleration, and trajectory. However, it can be in the range of millions of Newtons, with the space shuttle's main engines producing around 30 million Newtons of force during launch.