Physics quiz 1

Which of the following statements about orbital velocity is correct?

• a) It increases with increasing mass of the orbiting object

• b) It decreases with increasing radius of the orbit

• c) It is independent of the mass of the orbiting object

• d) It decreases with decreasing mass of the orbiting object

Which of the following best describes centripetal force?

• a) A force directed away from the center of rotation

• b) A force that keeps an object moving in a circular path

• c) A force that causes an object to move in a straight line

• d) A force that acts perpendicular to the direction of motion

In a rotating amusement park ride, what happens to the centripetal acceleration of a rider if the ride's speed doubles?

• a) It doubles

• b) It quadruples

• c) It halves

• d) It remains the same

If the mass of an object in uniform circular motion is doubled, what happens to the centripetal force required to maintain its motion?

• a) It doubles

• b) It quadruples

• c) It halves

• d) It remains the same

Which of the following is a correct statement about Newton's second law as it relates to circular motion?

• a) The net force acting on an object in uniform circular motion is zero

• b) The acceleration of an object in circular motion is always directed toward the center of the circle

• c) The centripetal force acting on an object is equal to the product of its mass and centripetal acceleration

• d) The velocity of an object in circular motion is constant

What determines the strength of centripetal force acting on an object in uniform circular motion?

• a) Mass of the object

• b) Speed of the object

• c) Radius of the circular path

• d) All of the above

How does an increase in the radius of a circular orbit affect the orbital velocity of an object?

• a) It decreases the orbital velocity

• b) It increases the orbital velocity

• c) It has no effect on the orbital velocity

• d) It depends on the mass of the object

According to the law of gravitation, what effect does doubling the distance between two objects have on the gravitational force between them?

• a) It quadruples the force

• b) It halves the force

• c) It doubles the force

• d) It reduces the force to one-fourth

Which law of motion is fundamental in explaining the concept of centripetal force?

• a) Newton's First Law

• b) Newton's Second Law

• c) Newton's Third Law

• d) Law of Conservation of Momentum

What is the relationship between centripetal force and centripetal acceleration?

• a) They are directly proportional

• b) They are inversely proportional

• c) They are unrelated

• d) They are equal in magnitude