A lawn mover is pushed with a force of 80 N. if 12,000 J of work is done in mowing a lawn, what is the total distance the lawn mover was pushed?
Answers
Answer:
Q1. Define Gravitational force.
Earth attracts all things towards it through an unseen force of attraction. This force of attraction is called as gravitational force.
Q2. Define centripetal force.
The change in direction involves change in velocity or acceleration. The force that causes this acceleration and keeps the body moving along the circular path is acting towards the center. This force is called centripetal force.
Q3. Write down the Kepler’s laws.
Kepler's laws are:
The orbit of a planet is an ellipse with the sun at one of the foci.
The line joining the planet and the sun sweep equal area in equal intervals of time.
The cube of the mean distance of a planet from the sun is proportional to the square of its orbital period T.
Q4. State the Universal law of gravitation with diagram.
The law of gravitation states that the force of attraction between any two objects is proportional to the product of their masses and inversely proportional to the square of the distance between them.
Q5. Derive:
Q6. List down the importance of the Universal law of gravitation.
Q7. Define Free Fall.
Q8. What is acceleration due to gravity?
Q9. Write the mathematical expression for ‘g’.
Q10. Write the difference between ‘G’ and ‘g’.
Explanation:
Answer:
80×1200ns8shdhdheusgduegwgxuehw8xywgduf