Which example shows an object acted on by two balanced forces? (1 point) A baseball rolling to a stop A car moving at a constant speed in a constant direction A snowflake landing on a roof A skateboard rolling down a hill with increasing speed
The example that shows an object acted on by two balanced forces is:
A car moving at a constant speed in a constant direction.
The example that shows an object acted on by two balanced forces is a car moving at a constant speed in a constant direction.
To determine which example shows an object acted on by two balanced forces, let's first understand what balanced forces are. Balanced forces are forces that are equal in magnitude and opposite in direction, canceling each other out. As a result, they do not cause any change in the object's motion.
Now, let's analyze each example to determine if it involves balanced forces:
1. A baseball rolling to a stop: In this case, there are several forces acting on the baseball, such as gravity, air resistance, and friction. However, these forces are not balanced because they are not equal in magnitude and opposite in direction. The frictional force opposes the motion of the baseball, causing it to slow down. Therefore, this example does not involve balanced forces.
2. A car moving at a constant speed in a constant direction: When a car is moving at a constant speed in a constant direction, the forces acting on it, such as the engine force and the friction force, are balanced. The engine force propels the car forward, while the friction force opposes it. Since these forces are equal in magnitude and opposite in direction, the car continues to move at a constant speed without any change in its motion. Therefore, this example involves balanced forces.
3. A snowflake landing on a roof: When a snowflake lands on a roof, it is affected by gravity, which acts vertically downwards. Since the snowflake is in equilibrium and not accelerating, the force of gravity is balanced by the normal force exerted by the roof. Therefore, this example involves balanced forces.
4. A skateboard rolling down a hill with increasing speed: In this scenario, the skateboard experiences the force of gravity pulling it down the hill and frictional force opposing its motion. The force of gravity is greater than the frictional force, resulting in an acceleration and an increase in speed. Thus, the forces are not balanced, and this example does not involve balanced forces.
Based on the analysis, the example that shows an object acted on by two balanced forces is a car moving at a constant speed in a constant direction.