Select the three situations in which unbalanced forces are acting on the objects.

Question

(3 points)

A basketball gaining speed as it rolls down a ramp

A rollercoaster slowing down as it nears the top of a hill

A race car moving at a constant speed around a circular track

A motorcycle parked in a driveway.

A car moving at a constant speed in a straight direction

Answer 1

The three situations in which unbalanced forces are acting on the objects are:

1. A basketball gaining speed as it rolls down a ramp - The force of gravity acting on the basketball is greater than the force of friction, resulting in an unbalanced force that causes the basketball to accelerate.

2. A rollercoaster slowing down as it nears the top of a hill - The forces acting on the rollercoaster are not balanced as it is losing speed, indicating that there is a net force acting on it.

3. A race car moving at a constant speed around a circular track - While the speed is constant, the direction is changing, indicating that there is a net force acting on the car (centripetal force), which causes it to change direction.

The situations involving the motorcycle parked in a driveway and the car moving at a constant speed in a straight direction do not have unbalanced forces acting on them, as they are both in a state of equilibrium.