Question

A string is attached to the rear-view mirror of a car. A ball is hanging on the other end of the

string. The car is driving along a circular path, at a constant speed. Which of the following lists
gives all of the forces directly acting on the ball?
A. tension
B. tension and gravity
C. tension and centripetal force
D. tension, gravity and centripetal force
E. tension, gravity, centripetal force and friction

Answer 1

B. tension and gravity

Step-by-step explanation:

Tension force: The force that is transmitted through a rope, string or wire when pulled by forces acting from opposite sides

Gravity: This is the force that attracts two bodies toward each other

Answer 2

E. tension, gravity, centripetal force and friction

Step-by-step explanation:

The forces acting on the ball are:

tension: caused by the string on wich the ball hangs.

gravity: this force is always acting on any object on earth.

centripetal force: due to the circular path the car follows, the ball also feels this centripetal force.

friction: the air represents an obstruction to the movement, so this is another of the forces that acts on the ball.