Unit 2A-Review

Front

What is a free body diagram and what does it represent?

Back

A free body diagram is a graphical representation used to visualize the forces acting on an object. It shows all the external forces acting on the object, allowing for the analysis of the object's motion.

Front

How do you calculate net force using Newton's second law?

Back

Net force (F) can be calculated using the formula F = ma, where 'm' is the mass of the object and 'a' is its acceleration.

Front

What factors affect gravitational attraction between two objects?

Back

Gravitational attraction between two objects is affected by their masses and the distance between them, as described by Newton's law of universal gravitation.

Front

What happens to gravitational attraction if the distance between two objects is doubled?

Back

If the distance between two objects is doubled, the gravitational attraction between them becomes one-fourth as strong.

Front

What is the difference between weight and normal force?

Back

Weight is the force exerted by gravity on an object, while normal force is the support force exerted by a surface that opposes the weight of an object resting on it.

Front

How does an elevator's acceleration affect the apparent weight of a person inside it?

Back

When an elevator accelerates upward, a person's apparent weight increases; when it accelerates downward, the apparent weight decreases.

Front

What is the significance of the normal force in physics experiments?

Back

The normal force is crucial in physics experiments as it affects the motion and acceleration of objects, particularly in scenarios involving friction and weight.

Front

What is the relationship between mass and acceleration in the context of force?

Back

The relationship is direct; as mass increases, for a constant force, acceleration decreases, and vice versa, according to Newton's second law.

Front

How do you determine the direction of forces in a free body diagram?

Back

The direction of forces in a free body diagram is determined by the nature of the forces acting on the object, such as gravity, friction, tension, and applied forces.

Front

What is the role of friction in motion and how does it affect net force?

Back

Friction opposes the motion of an object and reduces the net force acting on it, affecting its acceleration and overall motion.