Answer: 2934.75 Joules
Explanation:
Potential energy can be defined as energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
<em>P.E = mgh</em>
Where P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per second square.
h represents the height measured in meters.
Given the following data;
Weight =645
Height = 4.55
<em>P.E = mgh</em>
But we know that weight = mg = 645N
Substituting into the equation, we have;
<em>P.E = 645 • 4.55</em>
<em>P.E = 2934.75J</em>
Potential energy, P.E = 2934.75 Joules.
Answer:
The force is equal to 489.87 [N]
Explanation:
We need to make a free body diagram whe we can see the forces acting over the parachutist. In the attached image we can see the sketch of the free body diagram.
First we use the analysis of forces equal to mass by acceleration to be able to determine the equation with the term of the resistance force.
Then we have to find the acceleration to be able to apply it in the equation of the resistance force of the parachute. The acceleration can be found using the following kinematics equation
Note: here the acceleration is positive because the direction of the acceleration is towards the movement
Therefore the resistance force is 489.87 [N] or 49.93[kg-f]
Note: We can see that the resistance force of the parachute is almost equal to the equivalent of the weight of the parachutist, although its value is lower in this way it is explained by the fact that the system is not in balance and the person descends.
If an object has a balanced force on it, there is a possibility that the <u>object may be in a position</u> i.e. there is no change in speed and direction of the body.
If the forces acting on an object is balanced, it means that the net force acting on the body is zero.
According to Newton's law of motion, an object will continue in a state of motion in a straight line unless acted upon by an external force.
This external force might be a balanced or unbalanced force. Hence if an object has a balanced force on it, there is a possibility that the <u>object may be in a position</u> i.e. there is no change in speed and direction of the body.
Learn more here: brainly.com/question/20835245
Answer:
A force is a push or pull upon an object resulting from the object's interaction with another object.
Momentum is force or speed of movement.
Velocity defines the path of the motion of the frame or the object