Question

1. A ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line?
A. centripetal acceleration
B. centripetal force
C. centrifugal force
D. inertia

2. which of the following confirms that gravitational mass and inertial mass are equivalent?
A. free-fall acceleration is the same throughout the universe.
B. Free-fall acceleration is the same at all points where the gravitational field strength is the same
C. Newton's second law is valid throughout the universe
D. an object's weight can change with location but the object's mass remains constant