Bernie whose mass is 70 kg leaves a ski jump
Incomplete.
To determine what happens when Bernie, who has a mass of 70 kg, leaves a ski jump, we can consider the principles of physics.
1. Start with the given mass of Bernie (70 kg). Mass is a measure of the amount of matter in an object and is often used in calculations involving force, acceleration, and energy.
2. We can use the laws of motion to analyze Bernie's movement. The three laws of motion, formulated by Sir Isaac Newton, are fundamental principles in physics:
a. Newton's First Law of Motion (the law of inertia) states that an object at rest tends to stay at rest, and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an external force.
b. Newton's Second Law of Motion defines the relationship between an object's mass, acceleration, and net force. It states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass (F = ma).
c. Newton's Third Law of Motion states that for every action, there is an equal and opposite reaction. This means that any force exerted by Bernie on the ski jump will have an equal force exerted back on him.
3. When Bernie leaves the ski jump, he experiences several forces:
a. Gravity: Bernie will be acted upon by the force of gravity, which pulls objects downward. The force of gravity can be calculated using the formula F = mg, where m is the mass (70 kg) and g is the acceleration due to gravity (approximately 9.8 m/s^2).
b. Air resistance: As Bernie moves through the air, he will experience air resistance. The magnitude of air resistance depends on factors such as the object's shape and speed. Air resistance opposes the direction of motion and can affect Bernie's speed and trajectory.
c. Normal force: As Bernie leaves the ski jump, he pushes off the ramp, generating an upward force. According to Newton's third law, the ski jump exerts an equal and opposite normal force on Bernie, helping propel him forward.
4. The combination of these forces will determine Bernie's motion after leaving the ski jump. If the force exerted by Bernie's legs and the ski jump is greater than gravity and air resistance, he will accelerate and gain speed. The trajectory and distance traveled will depend on the initial velocity, angle of departure, and other factors.
Note: This explanation considers the basic principles of physics involved. In reality, the situation is more complex due to factors like aerodynamics, friction, and the shape of the ski jump. Detailed calculations and measurements would be needed for a more accurate analysis.